[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.27"]
[Round "1.1"]
[White "Bondar, Dmytro"]
[Black "Kozak, Leonid"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2254"]
[BlackElo "2244"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,73,41,0,10,-6,-2,-7,0,0,0,0,101,102,138,131,141,127,91,60,70,65,66,65,153,100,87,53,90,51,59,0,0,0,0,-51,2,0,61,46,145,143,245,231,232,162,524,534]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. Nh2 d5 {C95: Closed Ruy Lopez: Breyer Variation with 10 d4.} 16. Bg5 h6 17. Bxf6 {[#]} Nxf6 $146 {The position is equal.} ({Predecessor:} 17... Qxf6 18. Ng4 Qg7 19. dxe5 Nxe5 20. exd5 Nxg4 21. Qxg4 Bxd5 22. Qd7 Rxe1+ 23. Rxe1 Bd6 24. a4 f5 25. Re8+ Kh7 26. Bxf5 gxf5 27. Qxf5+ Qg6 28. Qd7+ Qg7 29. Qf5+ {½-½ (29) Garcia Acosta,R (2025)-Serra Pages,J (2260) Barcelona 2016}) 18. dxe5 Rxe5 {[%cal Rd5e4]} 19. Nf3 Re8 (19... Re6 $11) 20. e5 $16 Nh7 21. e6 f5 22. h4 h5 23. Nd4 {And now Ngxf5! would win.} Qxh4 24. Ndxf5 gxf5 25. Nxf5 Qg4 {[#]} (25... Qg5 $14) 26. Qd3 $1 {[%mdl 1024] Threatening mate with Nh6+! White has strong compensation.} Nf6 {aiming for ...Ne4.} 27. Re3 {Strongly threatening Rg3.} h4 {...Ne4 is the strong threat.} ({Wrong is} 27... Ne4 $2 {[#]} 28. Rg3 $1 $18 {[%mdl 512]}) 28. e7 Bg7 29. f3 (29. Rae1 $1 $14) 29... Qc4 30. Qd2 $1 Qf4 31. Qf2 ({Better is} 31. Qd3 $11 Qc4 32. Qd2) 31... Bc8 (31... Nh5 $1 $15 32. Nxg7 Kxg7) 32. Nxh4 $11 Bh6 (32... Qd6 $11) 33. Re2 $1 $14 Ne4 34. fxe4 $16 Rxe7 (34... Qxf2+ $16 {was worth a try.} 35. Kxf2 (35. Rxf2 Be3 $14) 35... Rxe7) 35. Qxf4 $18 Bxf4 36. Bb3 c6 (36... Kg7 {is a better chance.}) 37. Ng6 {[%mdl 64] Double Attack.  Weighted Error Value: White=0.15/Black=0.50} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.27"]
[Round "1.2"]
[White "Okhotnik, Vladimir"]
[Black "Kushko, Dmitriy"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "2350"]
[BlackElo "2285"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,47,17,32,28,32,10,12,0,0,-11,0,-25,22,0,-4,-25,-25,-26,-20,-25,-24,-36,-12,-14,-14,-20,-16,-20,-14,-22,-3,-7,-3,-25]} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O c6 7. Re1 Nbd7 8. Bf4 Qa5 9. Qd2 {B08: Pirc Defence: Classical System.} e5 10. dxe5 dxe5 11. Bh6 Re8 {[#]} 12. Bc4 $146 ({Predecessor:} 12. a3 Nf8 13. Rad1 Bg4 14. Be3 Rad8 15. Qc1 Ne6 16. Rxd8 Rxd8 17. Nd2 Nd4 18. Nb3 {½-½ (32) Sandor,M (1937)-Diviak,R (1986) Slovakia 2018}) 12... Qb4 13. Bb3 Nc5 14. Bxg7 Kxg7 15. Qe3 Bg4 16. a3 Qb6 17. Bc4 Bxf3 ({Wrong is} 17... Qxb2 $2 18. Reb1 $18) 18. Qxf3 Ne6 ({But not} 18... Qxb2 $2 19. Reb1 $18) 19. Bxe6 {The position is equal.} Rxe6 20. Red1 Rd8 ({Don't go for} 20... Qxb2 $2 21. Rdb1 $18) 21. Na4 Rxd1+ 22. Rxd1 Qa5 23. Nc3 Qc7 24. Rd3 {An uneventful encounter.  Weighted Error Value: White=0.07/Black=0.09} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.27"]
[Round "1.3"]
[White "Gavrish, Leonid"]
[Black "Boricsev, Oleg"]
[Result "1/2-1/2"]
[ECO "A52"]
[WhiteElo "2085"]
[BlackElo "2234"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,71,69,43,41,16,45,45,41,39,50,52,57,43,52,0,0,6,129,146,155,128,200,199,197,149,161,89,103,83,79,79,79,79,79,79,79,79,79,19,156,156,156,156,156,156,156,156,149,0,156,79]} 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 Nc6 5. Nf3 Bb4+ 6. Nbd2 Qe7 7. e3 Ngxe5 8. Nxe5 Nxe5 9. Be2 b6 10. O-O Bxd2 11. Qxd2 Bb7 12. Qc3 f6 {A52: Budapest Gambit.} 13. Rfd1 d6 {[#]} 14. b4 $146 ({Predecessor:} 14. Rac1 c5 15. Rd2 O-O 16. Rcd1 Rfd8 17. Qc2 Rd7 18. Qf5 g6 19. Qh3 Rad8 20. Bxe5 Qxe5 {½-½ (53) Linster,P (2205)-Schuh,D (2304) Pardubice 2009}) 14... a5 {White is slightly better.} 15. a3 axb4 16. axb4 O-O 17. Rac1 Ra2 18. c5 {Strongly threatening Bxe5.} Rxe2 19. Bxe5 {Qc4+ is the strong threat.} Kh8 {[#]} (19... Qe6 $11 20. Bg3 dxc5) 20. Qc4 $1 $16 {[%cal Re5d6] Threatens to win with Bxd6.} Rxf2 21. Kxf2 fxe5+ (21... Qxe5 $16 {was worth a try.} 22. cxd6 cxd6) 22. Kg1 $18 bxc5 23. bxc5 Qg5 {[%csl Gb7][%cal Rg5g2]} 24. Qe2 (24. c6 $1 $18 {[%cal Rc6b7]} Bc8 25. Rf1) 24... Be4 $16 25. cxd6 (25. Rf1 {looks sharper.} Rxf1+ 26. Rxf1 h6 27. cxd6 cxd6 28. Rf8+) 25... cxd6 {[#]} 26. Qf2 $1 $40 {[%cal Rf2f8][%mdl 128] White goes for the king.} Kg8 27. Qg3 Qxg3 28. hxg3 {[%mdl 4096] Endgame KRR-KRB} d5 29. Rc7 Rf7 30. Rdc1 (30. Rc8+ $16 Rf8 31. Rxf8+ Kxf8 32. Kf2) 30... Rxc7 (30... h5 $1 $11 {keeps the balance.}) 31. Rxc7 $11 {KR-KB} Kf8 {[#]} 32. g4 $1 g5 33. Kf2 Bg6 34. Rd7 Bf7 35. Rc7 (35. Rb7 $16) 35... Kg7 $2 {[#]} (35... Bg6 $1 $11) 36. Ra7 {Weighted Error Value: White=0.20/Black=0.34} (36. Rc6 $142 $1) 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.27"]
[Round "1.4"]
[White "Vakulenko, Oleksandr"]
[Black "Sydoryka, Vladyslav"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2256"]
[BlackElo "2331"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,108,0,-5,0,0,0,0,0,20,0,10,13,12,1,0,31,24,30,30,27,34,34,25,81,79,80,78,77,77,75,73,69,72,75,39,45,54,52,45,32,15,35,10,44,36,34,21,28,27,92,89,88,54,67,91,98,98,77,76,129,38,37,8,8,11,25,10,10,0,0,0,0,0,0,0,0,0,20,20,204,191,181,-124,-140,-140,-99,-29,-26,-25,-25,-607,-525,-447,-260,-29982,-29983,-29987,-29988,-29998,-29999]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. d5 O-O 6. e4 b5 {E20: Nimzo-Indian: 4 g3 and 4 f3.} 7. Nh3 {now supersedes 7.e5.} bxc4 8. Bxc4 Nxd5 {The position is equal.} 9. Bxd5 exd5 10. Qxd5 Ba6 11. Bf4 (11. Qxa8 Bxc3+ 12. bxc3 Qh4+ 13. Kd1 Nc6 $15) 11... Nc6 12. Kf2 Qb6 {[#]} 13. a3 $146 (13. Qxd7 Rad8 $15) ({Predecessor:} 13. Rhd1 Nd4 14. Qd6 Ba5 15. Rab1 Bc4 16. Na4 Qb5 17. b3 Be6 18. Qxc5 Qe2+ 19. Kg3 Bxh3 20. Kxh3 {½-½ (100) Kobo,O (2460)-Pichot,A (2630) Chess.com INT 2021}) 13... Ba5 14. Na4 Qb5 15. Nxc5 {aiming for Kg3.} Ne7 16. Qd6 Bb6 17. b4 $16 Nc8 18. Qd2 d6 {[%mdl 64] [#] Pin} 19. a4 $1 Qc6 {[%mdl 64] [#] Pin} 20. a5 $1 Bxc5+ 21. bxc5 dxc5 22. Rac1 c4 23. Qb4 Re8 24. Rhd1 Ne7 25. Bd6 Ng6 26. Nf4 Rad8 27. Nxg6 hxg6 28. Qc5 Qd7 29. Bc7 Qxd1 30. Rxd1 Rxd1 31. Qxa7 Rd7 {Hoping for ...Rc8.} 32. Qb6 $1 {[%cal Rb6c6]} (32. Qxa6 $2 Rxc7 33. Qd6 Rec8 $19) 32... Re6 33. Qc5 Rd2+ 34. Kg3 Rc2 ({Better is} 34... Rd3) 35. Be5 (35. Qd5 $16) 35... c3 $14 36. Bxc3 {Black must now prevent Qd4.} Bf1 37. h4 Rf6 38. f4 Bxg2 39. Qd4 Kh7 40. Ba1 Ra2 $1 41. Bc3 Bh1 42. Kh3 {And now Qd5 would win.} Bg2+ 43. Kg4 {Qc4 is the strong threat.} Bf1 44. Qd5 Rg2+ $2 (44... Ra3 $1 $11 {and Black is okay.} 45. Qc5 (45. Bxf6 $2 Be2+ 46. Kg5 Rg3#) 45... Rb3) 45. Kf3 $18 Re6 46. a6 $2 {[#]} (46. Qd4 $1 $18 {[%csl Gc3][%cal Rd4g7]} f6 47. Qd7) 46... Rc2 $1 $17 {[%cal Rc2c3]} 47. a7 {[#]} (47. Qd4 f6 $15) 47... Bg2+ $1 ({Inferior is} 47... Rxc3+ 48. Kf2 $16) 48. Kg3 Rxe4 49. Qd3 ({Don't blunder} 49. a8=Q $2 Re3+ 50. Qf3 Bxf3 $19) 49... Ree2 {Threatens to win with ...Be4.} 50. h5 $2 {[%mdl 8192]} (50. f5 $11 Be4 51. fxg6+ Kxg6 52. Qa6+ f6 53. Kg4) 50... Be4 $19 {( -> ...Rg2+)} 51. hxg6+ Kxg6 (51... fxg6 $142 52. Qxe4 (52. Qd4 $2 {gets mated.} Rg2+ 53. Kh3 Rh2+ 54. Kg4 Rcg2#) 52... Rxc3+ 53. Kg4 Rxe4) 52. Qxe4+ (52. f5+ $19 Kg5 53. Qd8+ f6 54. Bxf6+ gxf6 55. Qg8+ Kxf5 56. Qh7+ Ke6 57. Qg8+ Kd7 58. Qg7+ Ke8 59. Qg8+ Ke7 60. Qg7+ Ke8 61. Qg8+ Ke7 62. Qg7+ Ke6 63. Qg8+ Ke7) 52... Rxe4 {Black mates.} 53. a8=Q Re3+ {[%mdl 64] Double Attack} 54. Kg4 f5+ {Weighted Error Value: White=0.45/Black=0.15} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.27"]
[Round "1.5"]
[White "Kocyigit, Buse Naz"]
[Black "Anwesh, Upadhyaya"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2143"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,82,0,0,0,0,0,0,0,0,0,0,0,-14,0,-6,0,0,0,0,0,0,0,0,0,-16,-11,-11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. Be2 O-O 8. O-O dxc4 9. a4 e5 10. Bxc4 {The position is equal.} exd4 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran.} 11. exd4 Nb6 12. Bb3 Nbd5 13. Bg5 {[#]} Be7 $146 ({Predecessor:} 13... Be6 14. Nxd5 cxd5 15. Qd3 Be7 16. Ne5 Ne4 17. Bxe7 Qxe7 18. f3 Nd6 19. Rfe1 Rac8 20. a5 Qg5 21. Rad1 Rfd8 22. g3 Nc4 23. Bc2 g6 24. Nxc4 Rxc4 25. Bb3 {½-½ (25) Mamedyarov,S (2804)-Matlakov,M (2718) Wijk aan Zee 2018}) 14. Rfe1 Be6 15. Nxd5 cxd5 16. Rac1 Rc8 17. Qd3 Rxc1 18. Rxc1 Ne4 19. Bxe7 Qxe7 20. Qb5 Rd8 21. a5 h6 22. Rc2 Qd6 23. Ne5 ({Don't blunder} 23. Qxb7 $2 Rb8 $19) 23... a6 24. Qb6 ({Wrong is} 24. Qxb7 $2 Rb8 $19) 24... Qxb6 25. axb6 Rd6 26. Rc6 Kf8 27. f3 Rxc6 (27... bxc6 $2 {is the wrong capture.} 28. b7 $18) 28. Nxc6 $11 {[%mdl 4096] Endgame KBN-KBN} Nf6 29. Na5 Bc8 30. Kf2 Ke7 31. Ba4 Kd6 32. Ke3 g5 33. g3 Nh5 34. Be8 Ke7 35. Ba4 f5 36. Kf2 f4 37. g4 Ng7 38. Ke2 Ne6 39. Kd3 Nd8 40. Kc3 Nf7 41. Kb4 Kd6 $1 {An uneventful encounter.  Weighted Error Value: White=0.01/Black=0.01} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "2.1"]
[White "Kozak, Leonid"]
[Black "Anwesh, Upadhyaya"]
[Result "0-1"]
[ECO "A50"]
[WhiteElo "2244"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,82,32,27,37,2,31,30,29,35,47,37,56,56,43,47,46,48,60,46,39,36,21,24,64,60,43,43,46,54,38,41,54,22,95,0,3,0,10,0,21,12,31,-17,-22,-102,-102,-88,-91,-123,-118,-150,-145,-190,-191,-186,-188,-183,-192,-184,-189,-190,-194,-219,-220,-204,-163]} 1. d4 Nf6 2. c4 c6 3. Nc3 d5 4. cxd5 cxd5 5. Bf4 a6 6. e3 Nc6 7. Bd3 Bg4 8. Nge2 e6 9. O-O Be7 10. Rc1 O-O {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.} 11. Na4 Nd7 12. a3 Rc8 {White has an edge.} 13. b4 e5 14. dxe5 Ndxe5 {[#]} 15. Bxe5 $146 ({Predecessor:} 15. h3 Nxd3 16. Qxd3 Bxe2 17. Qxe2 d4 18. Rfd1 Re8 19. Qf3 Bf8 20. Nc5 Bxc5 21. Rxc5 {½-½ (72) Sargissian,G (2671)-Artemiev,V (2524) Khanty-Mansiysk 2013}) 15... Nxe5 16. Rxc8 Bxc8 17. Nac3 g6 18. Bb1 Nc4 19. Qc1 Be6 20. Rd1 Bd6 21. g3 Qg5 22. Nf4 {[%cal Rf4d5]} Nb6 {[#]} 23. Ne4 $1 {[%mdl 64] Pin} Qe7 {White must now prevent ...Bxf4.} (23... Qd8 24. Nxd6) 24. Nxd6 Qxd6 25. Ba2 Bg4 (25... Rc8 $1 $11 26. Qd2 Nc4 27. Bxc4 Rxc4) 26. Rd2 ({Better is} 26. Rd4 $1 $16) 26... Rc8 $11 27. Rc2 Rd8 28. Rd2 Qe5 29. Nd3 Qe7 30. Qc5 Qf6 31. Qd4 (31. Ne5 $1 $11 {keeps the balance.} Rc8 32. Qd4) 31... Qxd4 $17 32. exd4 Nc4 33. Bxc4 dxc4 {[%mdl 4160] Endgame Discovered Attack. KRB-KRN} 34. Ne5 Be6 {Black is clearly better.} 35. d5 {[#]} c3 $1 36. Rc2 Rxd5 37. f4 f6 $1 {[%cal Rf6e5]} 38. Nf3 {[#]} Rd3 {[%cal Rd3f3]} 39. Ne1 {[#]} Bb3 $1 {[%cal Rb3c2][%mdl 512]} 40. Nxd3 (40. Rc1 Rd1) 40... Bxc2 41. Nc1 Bd1 {Weighted Error Value: White=0.19/Black=0.11} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "2.2"]
[White "Sydoryka, Vladyslav"]
[Black "Kocyigit, Buse Naz"]
[Result "1-0"]
[ECO "A15"]
[WhiteElo "2331"]
[BlackElo "2143"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,73,29,14,10,11,10,0,25,-23,-31,-22,0,-64,-49,-37,-8,-3,19,-32,0,0,8,2,104,93,124,114,248,236,218,245,248,245,252,240,246,226,404,385,395,391,519,516,778,770,786,771,940,918,29947,5302,1069,1036,29984,29985,29985,29986,29987,29985,29985,29985,29987,29988]} 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 O-O 5. d3 d6 6. Rb1 a5 {6...a5 is better than 6...e5.} 7. a3 c6 {A16: English Opening: 1...Nf6 with ...d5.} 8. e4 e5 9. Nge2 Be6 {[#] The position is equal.} 10. f4 $146 ({Predecessor:} 10. O-O Na6 11. b3 Qd7 12. Re1 Bh3 13. Bh1 Ng4 14. Bg2 Bxg2 15. Kxg2 f5 16. f3 Nf6 17. Bg5 Nh5 18. Qd2 {½-½ (38) Kelly,B (2451)-Hebden,M (2515) West Bromwich 2002}) 10... Na6 11. h3 Qb6 12. Qd2 (12. g4 $11) 12... exf4 13. gxf4 d5 14. cxd5 cxd5 {With the idea ...d4.} 15. e5 (15. f5 $11 gxf5 16. exd5) 15... Nh5 (15... d4 $5 {[%cal Rd4c3]} 16. Na4 (16. exf6 dxc3 17. Qxc3 Ba2 $17) 16... Qb3 17. exf6 Bxf6 $15) 16. Qe3 Qd8 17. O-O Qd7 (17... Nb8 $11 {keeps the balance.}) 18. Nd4 $16 {Threatens to win with f5!} Bh6 {[#]} 19. Qf3 $1 $36 {[%mdl 2048] And now f5 would win. White is in control.} Rad8 {This costs Black the game.} (19... Ng7 $16 {is a better defense.}) 20. f5 $18 Bxc1 21. Rbxc1 ({Resist} 21. Rfxc1 $6 Bxf5 22. Nxf5 (22. Nxd5 Bxh3 23. Qxh5 {[%mdl 64] Remove Defender} gxh5 $15) 22... Qxf5 $16) 21... Bxf5 22. Nxf5 Qxf5 23. Qxf5 gxf5 24. Nxd5 ({Don't take} 24. Rxf5 $6 Ng7 $16) 24... Ng3 $2 (24... Kh8 {was necessary.} 25. Rc4 (25. Rxf5 Ng7 $18) 25... f4 26. Nxf4 Nxf4) 25. Rf2 Kh8 26. Kh2 Rg8 27. Nf6 {[%mdl 64] [#] Discovered Attack} Rg7 (27... Rg5 $142 28. Bxb7 Nb8) 28. Bxb7 Nb8 29. Rfc2 Nd7 30. Rc8 Nxf6 31. exf6 Rgg8 32. Rxd8 {[%mdl 64] Overworked Piece} Rxd8 33. Kxg3 {White mates.} Rxd3+ 34. Kf4 h6 35. Bc8 Rd4+ 36. Kxf5 Kh7 37. Ke5 {Weighted Error Value: White=0.11/Black=0.74} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "2.3"]
[White "Boricsev, Oleg"]
[Black "Vakulenko, Oleksandr"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2234"]
[BlackElo "2256"]
[Annotator "TA"]
[PlyCount "28"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,28,22,28,25,34,-114,-136,-129,-129,-134,11,-103,-46,-58,-55,-62,-43,-45,-25,-29995,-29996]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. O-O d6 6. Nc3 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} g5 {[#] 6...Na5 is becoming the main line.} 7. Bxg5 $146 (7. Be3 $14) ({Predecessor:} 7. Ne2 g4 8. Ne1 Be6 9. Bb3 Qd7 10. c3 O-O-O 11. Bxe6 Qxe6 12. b4 d5 13. Qc2 dxe4 14. dxe4 {0-1 (54) Muzychuk,A (2535)-Vaishali,R (2393) chess.com INT 2020}) 7... hxg5 $17 8. Nxg5 {Black is clearly better.} d5 9. exd5 Na5 (9... Nd4 $17 {...Ng4 is the strong threat.} 10. d6 Be6 11. dxc7 Qxc7) 10. Qe2 (10. Bb5+ $1 $11 c6 11. dxc6 bxc6 12. Qf3) 10... Ng4 ({Black should try} 10... Nxc4 $17 11. dxc4 Bd6) 11. Nf3 {Strongly threatening Bb5+.} Nxc4 12. dxc4 f6 13. h3 {[#]} Qe7 $1 14. hxg4 $2 {[%mdl 8192]} (14. c5 $11) (14. Rae1 Nh6) 14... Qh7 {[%csl Gh8][%cal Rh7h1] Weighted Error Value: White=1.33/Black=0.30} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "2.4"]
[White "Kushko, Dmitriy"]
[Black "Gavrish, Leonid"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2285"]
[BlackElo "2085"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,85,32,34,41,20,36,36,39,43,46,31,38,22,25,27,34,32,35,15,56,34,89,96,89,18,95,88,108,96,106,71,131,131,131,131,131,131,177,103,87,103,144,150,143,143,284,272,415,404,527,535,636,634,527,471,1695,1658,1443,618,2019,1708,1963,1826,2320,2085,2397,2108,3317,2583]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 c5 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Ng4 {8...Qa5 is a critical line.} 9. e3 Nxd4 10. exd4 d6 {A39: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4.} 11. Nd5 Nf6 12. Nxf6+ Bxf6 {White is slightly better.} 13. Be3 {[#]} Bd7 $146 ({Predecessor:} 13... Be6 14. d5 Bf5 15. Bd4 Bxd4 16. Qxd4 Qb6 17. Qc3 Rac8 18. Rfe1 e5 19. b4 Rc7 {1-0 (43) Ricardi,P (2540)-Tempone,M (2438) Buenos Aires 2003}) 14. Qd2 Rc8 15. Qe2 b6 16. Rac1 e6 17. Rfd1 Re8 18. b4 Ba4 19. Re1 Bc6 (19... d5 $14) 20. Bxc6 $16 Rxc6 21. a4 (21. c5 $16) 21... Rc8 (21... Bg5 $11) 22. c5 bxc5 23. dxc5 dxc5 24. Bxc5 Be7 (24... Qd7 $142) 25. Red1 Qc7 26. Be3 Qb7 27. b5 Qe4 {[#]} 28. Qa2 (28. Rxc8 $1 $18 Rxc8 29. Qb2) 28... h5 29. Qa1 $36 {[%mdl 2048] White is in control.} h4 {[#] Hoping for ...h3.} 30. Qd4 $1 ({Avoid the trap} 30. Bxa7 $2 h3 $19) 30... Qf3 {White must now prevent ...Rcd8.} 31. Qf4 ({And not} 31. gxh4 Rcd8 $17) ({Not} 31. Qxa7 $2 h3 $19) 31... Qb7 (31... Qe2 $16 {might work better.}) 32. gxh4 $18 Ba3 (32... Red8 $142 33. Rxc8 Rxc8) 33. Rxc8 Rxc8 34. h5 {White is clearly winning.} Qc7 35. Qxc7 Rxc7 36. hxg6 fxg6 {[%mdl 4096] Endgame KRB-KRB} (36... Kg7 $142 37. a5 Be7) 37. Rd8+ Kf7 38. Ra8 Kf6 39. Rxa7 Rc4 40. a5 {[%cal Ba4a5,Ba5a6][%mdl 32]} Bd6 41. Rd7 Rg4+ 42. Kf1 Bxh2 43. a6 {Weighted Error Value: White=0.13/Black=0.45} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "2.5"]
[White "Bondar, Dmytro"]
[Black "Okhotnik, Vladimir"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2254"]
[BlackElo "2350"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,100,40,79,56,67,73,70,70,80,71,102,13,15,-17,-15,-115,-128,-142,-137,-143,-132,-136,-135,-184,-178,-360,-366,-310,-141,-139,-142,-146,-141,-133,-140,-179,-171,-240,-167,-197,-141,-171,-115,-146,-119,-119,-119,-118,-100,-160,-164,-160,-168,-157,-150,-197,-199,-344,-331,-398,-394,-402,-404,-400,-363,-374,-373,-414,-422,-420,-385,-405,-395,-397,-419,-407,-407,-426,-319,-319,0,-471,-462,-481,-472,-507,-412,-531,-535,-524,-452,-1900,-1899]} 1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 Qb6 6. h3 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6.} h5 7. a3 Nh6 8. Be3 {[#] White is slightly better.} Nf5 $146 {[#]} (8... Qxb2 $2 9. Na4 $18) ({Predecessor:} 8... Bf5 9. b4 f6 10. Nf3 Nf7 11. Qd2 Nd7 12. Nh4 Nf8 13. Nxf5 gxf5 14. Bd3 e6 15. O-O fxe5 16. fxe5 {0-1 (38) Buchnicek,P (2205)-Stratil,L (2365) Czechia 1996}) 9. Bf2 h4 ({But not} 9... Qxb2 $2 10. Na4 $18) 10. Nf3 ({White should play} 10. Bd3 $16) 10... Bh6 $1 $11 ({Not} 10... Qxb2 $2 11. Na4 $18) 11. Qc1 {[#]} Bxf4 $1 {[%mdl 64] Deflection} 12. Qxf4 (12. Nxd5 $1 $11 {was the only way to keep the balance.} Bxc1 13. Nxb6 Bxb2 14. Nxa8 Bc3+ 15. Kd1 Bxa1 16. Kd2) 12... Qxb2 $17 {[%mdl 64] Double Attack} 13. Ra2 Qxc3+ 14. Kd1 Qa5 15. Bd3 {[%cal Rf3h4]} Na6 16. Nxh4 {[#]} Nb4 $1 {[%cal Rb4a2][%mdl 512]} 17. axb4 (17. Qd2 {was the only defense.} Nxh4 18. Qxb4 Qxb4 19. axb4) 17... Qxa2 $19 18. Rf1 Rxh4 19. Bxh4 $17 {[#]} Qa1+ $1 20. Kd2 Qxd4 21. Qxd4 Nxd4 22. c3 Ne6 23. g4 (23. Ra1 {was necessary.}) 23... Bd7 24. Bf2 Nf4 ({Better is} 24... a5 $19 {White must now prevent ...axb4.} 25. Ra1 a4) 25. Ra1 a6 (25... a5 $19 26. bxa5 Nxh3) 26. Be3 Nxd3 ({Don't play} 26... Nxh3 27. Rh1 $15) 27. Kxd3 {[%mdl 4096] Endgame KRB-KRB} O-O-O 28. Rg1 f5 29. Bg5 (29. exf6 $142 exf6 30. h4) 29... Rh8 30. Rg3 Rh7 31. Kd4 Kc7 32. Bf4 {With the idea e6+.} Be6 33. g5 (33. gxf5 $142 Bxf5 34. Bg5) 33... b6 $19 {[%cal Bb7b6,Bb6c5][%mdl 32]} 34. Ke3 c5 35. bxc5 bxc5 36. Kf2 Rh4 37. Rf3 Rh8 38. Kg3 Rb8 39. h4 Kc6 40. h5 gxh5 41. Kh4 Rb3 42. g6 d4 43. Bd2 Rb2 44. Bg5 Rb3 $2 (44... Rg2 $19 {Threatens to win with ...f4!} 45. cxd4 cxd4 46. Kxh5 Kd5) 45. Bxe7 $2 {[%mdl 8192]} (45. Bd2 $1 $11 {and White stays safe.} a5 46. Rg3) 45... Rxc3 46. Rf1 Rc2 47. g7 d3 48. Bg5 {intending Rxf5.} Kd5 {Black is clearly winning.} 49. Rxf5 d2 50. Rf8 (50. Rf1 $142 c4 51. Kxh5) 50... Rc4+ {Weighted Error Value: White=0.58/Black=0.22} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "3.1"]
[White "Okhotnik, Vladimir"]
[Black "Kozak, Leonid"]
[Result "1/2-1/2"]
[ECO "B50"]
[WhiteElo "2350"]
[BlackElo "2244"]
[Annotator "TA"]
[PlyCount "188"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,188,0,-11,-7,-9,14,4,12,0,0,0,4,3,16,-10,0,-11,7,0,22,22,30,27,40,33,38,46,44,39,59,39,40,12,47,32,39,27,43,39,50,37,42,15,62,61,83,64,78,68,77,47,67,48,58,61,153,145,151,121,152,145,159,148,151,63,64,47,110,116,130,124,180,90,250,233,243,242,207,130,178,163,271,275,336,324,320,203,452,245,315,274,327,161,363,363,363,325,427,433,436,434,430,379,420,404,420,391,434,427,392,373,1204,416,486,429,355,304,368,358,727,507,684,521,466,302,304,304,301,287,277,273,183,191,191,191,191,191,191,191,191,191,191,191,191,190,189,189,189,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8]} 1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 4. d3 e6 5. O-O Be7 6. Bb3 O-O {B50: Sicilian: 2...d6, Miscellaneous.} 7. c3 b6 8. Re1 Bb7 9. Nbd2 Nbd7 10. Nf1 Qc7 11. Ng3 Ne5 12. Bf4 {[#]} Ng6 $146 ({Predecessor:} 12... Nxf3+ 13. Qxf3 Nd7 14. d4 c4 15. Bc2 g6 16. Bh6 Rfe8 17. Qe3 b5 18. f4 e5 {1-0 (29) Fedorov,A (2617)-Golubev,M (2467) Predeal 2006}) 13. Bd2 Rfe8 14. d4 Bf8 15. Rc1 h6 16. Bc2 a6 17. Qe2 e5 18. d5 Nf4 19. Qd1 g6 20. Nf1 Bg7 21. g3 N4h5 22. Ne3 Bc8 23. Nh4 Qd8 24. a4 b5 25. Ra1 Bd7 26. f3 Kh7 27. Qe2 Qb6 28. Ra2 Qb7 29. Rea1 Reb8 30. Qf2 Kg8 31. b4 c4 32. Nhg2 Ne8 (32... Nh7 $14) 33. Ng4 $1 $16 Kh7 34. Qe3 $1 {[%cal Rg4h6]} Bxg4 35. fxg4 Nhf6 36. Qf3 Kg8 37. g5 (37. a5 $16) 37... hxg5 $14 38. Bxg5 Nh7 (38... a5 $1 $14) 39. Be3 Qc8 40. g4 Nc7 (40... Nef6 $16) 41. h3 (41. a5 $18) 41... Nf6 $2 (41... a5 $16) 42. a5 Qd7 43. Rf1 Rf8 44. Bd1 Nh7 45. Raf2 f6 (45... f5 $142) 46. h4 Rf7 47. Bd2 Raf8 48. Ne3 Qd8 $2 (48... Bh6 49. Nxc4 {[%mdl 64] Discovered Attack} Bxd2) 49. Qg3 (49. h5 $142 gxh5 50. Nf5) 49... Rd7 50. Bf3 Rff7 51. Bg2 (51. h5 $142 g5 52. Nf5) 51... Qf8 $2 (51... Bh6 {was necessary.} 52. g5 fxg5) 52. Bh3 $18 Rde7 53. Ng2 Bh6 {If Black can now play ...Bxd2 this consolidates a bit.} 54. g5 fxg5 55. hxg5 Bg7 56. Nh4 Rxf2 57. Rxf2 Qe8 58. Qg4 Nf8 59. Be3 Qb8 60. Qg3 Ne8 $2 {[#]} (60... Qe8 61. Qg4 Rf7) 61. Nf3 (61. Rxf8+ $142 $1 {[%mdl 512]} Bxf8 62. Nxg6) 61... Rf7 62. Nh2 Rxf2 63. Qxf2 Qd8 64. Bg4 Nh7 $2 (64... Nc7 65. Nf3 Qe8) 65. Be6+ Kh8 66. Qf7 {[%csl Ge6][%cal Rf7g8]} Nc7 67. Qxg6 Nxe6 68. dxe6 ({Not} 68. Qxe6 Nxg5 69. Qf5 Nh7 $14) 68... Qe7 69. Qf7 $1 {[%cal Rf7e7]} Qxf7 70. exf7 {[%mdl 4096] Endgame KBN-KBN} Nf8 71. Nf3 Ng6 72. Nd2 $1 {[%cal Rd2c4] Black must now prevent Nxc4!} Ne7 73. g6 $1 {Hoping for Nxc4!} Bf8 74. Bg5 $1 {[%cal Rg5f6] White threatens Bf6+ and mate.} Kg7 75. Bxe7 Bxe7 {KB-KN} 76. Kg2 Kxg6 {[#]} 77. Nxc4 $1 {[%mdl 512]} Kxf7 {[#]} ({Don't go for} 77... bxc4 $2 78. b5 $18) 78. Na3 $1 Bd8 79. Nc2 $2 ({White must play} 79. c4 $18 bxc4 80. Nxc4) 79... Ke6 {The position is equal.} 80. Ne3 Bg5 81. Nd5 Kd7 82. Kf3 Kc6 83. Ke2 Bh4 84. Kd3 Bg5 85. c4 Bh4 86. Nc3 bxc4+ 87. Kxc4 Be1 88. Nd5 Bd2 89. Kd3 Be1 90. Ke2 Bh4 91. Kd2 Bg3 92. Ne7+ Kb5 93. Nd5 Kc4 94. Nc7 Kxb4 {Black escapes into a draw.  Weighted Error Value: White=0.19/Black=0.33} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "3.2"]
[White "Gavrish, Leonid"]
[Black "Bondar, Dmytro"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "2085"]
[BlackElo "2254"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,74,47,49,9,20,0,8,-6,-8,0,36,10,19,-23,-26,-1,18,0,0,0,0,-5,40,38,71,62,79,18,0,-64,-65,-86,-80,-188,-215,-1196,25,-1105,-192,-176,-186,-166,-162,-165,-5,-5,0,0,0,0,0,0,0,-816,-816,-815,-812,-764,-812,-966,-966,-965,-762,-749,-729,-795,-755]} 1. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Bg5 Nbd7 5. Qc2 g6 6. e4 {A85: Dutch Defence: 2 c4 Nf6 3 Nc3.} fxe4 7. Nxe4 Bg7 8. Nf3 {The position is equal.} Nxe4 9. Qxe4 Nf6 10. Bxf6 Bxf6 {[#]} 11. O-O-O $146 ({Predecessor:} 11. Bd3 Bf5 12. Qe3 Qd7 13. O-O O-O 14. Rfe1 a6 15. Nd2 Rae8 16. Ne4 Bg7 17. Ng3 {½-½ (45) Thybo,J (2255)-Rasmussen,A (2502) Helsingor 2015}) 11... Bf5 12. Qe3 c5 13. dxc5 {And now Rxd6 would win.} Qa5 {[%mdl 64] Double Attack} 14. a3 O-O $40 {[%mdl 128] Black mounts an attack.} 15. Bd3 {With the idea Bxf5.} Bxd3 16. Rxd3 Rac8 17. cxd6 exd6 18. Re1 (18. Qe6+ $16 Kh8 19. Kb1 (19. Rxd6 Qa4 $14)) 18... b5 $11 {[%cal Bb7b5,Bb5c4,Bc4c3][%mdl 32]} 19. Rxd6 (19. Qe6+ $11 Kh8 20. Qxd6 (20. Rxd6 bxc4 21. Qd5 Rc5 $17)) 19... bxc4 $15 {...c3 is the strong threat.} 20. Qe6+ Kh8 {Hoping for ...c3.} 21. Rd5 (21. Qd5 $17 {is a better defense.} Rc5 22. Rxf6 Rxd5 23. Rxf8+ Kg7 24. Rc8) 21... Qa4 $1 $19 {aiming for ...c3.} 22. Qd7 $2 {[#]} (22. Qe4) 22... Qb3 $2 ({Black should play} 22... Bxb2+ $1 $19 {[%mdl 512]} 23. Kxb2 c3+ 24. Kc1 Qxa3+ 25. Kd1 Qa2) 23. Ne5 $2 {[%mdl 8192]} (23. Rb5 $11 Rfd8 24. Qxd8+ $1 (24. Rxb3 cxb3+ 25. Qxc8 Rxc8+ 26. Kd2 Bxb2 $17) 24... Rxd8 25. Rxb3 cxb3 26. Re3) 23... Bxe5 $2 (23... c3 24. Nf7+ Rxf7 $1 {[%mdl 512]} 25. Qxc8+ Kg7 26. bxc3 Qxd5) 24. Rdxe5 {White wants to mate with Re7.} c3 25. R5e2 cxb2+ 26. Kb1 Qc3 (26... Rcd8 $19 27. Qe6 Qxa3 28. Qe5+ Kg8 29. Qe6+ Rf7 30. Rxb2 Qd3+ 31. Rc2 a6) 27. Qd2 $11 Qf6 28. f3 ({Don't blunder} 28. Qxb2 $2 Rb8 $19) 28... Rfd8 29. Qxb2 Rb8 $1 {[%cal Rb8b2][%mdl 64] Pin} 30. Re8+ $1 Kg7 $1 {[%csl Gb8][%cal Rf6b2]} 31. R8e7+ $2 {[%mdl 8192]} (31. Qxb8 $11 Rxb8+ 32. Rxb8) 31... Kh6 $19 {[%csl Gb8][%cal Rf6b2] Black is clearly winning.} 32. Rb7 Rxb7 33. Qxb7 {[#]} Rd6 $1 34. Qxa7 Rb6+ 35. Qxb6 Qxb6+ 36. Kc1 Qf2 37. Kd1 Qxg2 {Weighted Error Value: White=0.80/Black=0.50} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "3.3"]
[White "Vakulenko, Oleksandr"]
[Black "Kushko, Dmitriy"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "2256"]
[BlackElo "2285"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,96,34,38,26,36,23,28,18,29,28,25,18,28,0,0,-66,-59,-49,-41,-72,-61,-75,-34,-35,-20,-36,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-6,-17,-21,-31,-9,-47,-35,-33,-31,-175,-177,-197,-208,-222,-232,-209,-217,-224,-212,-310,-289,-227,-310,-702,-658,-1150,-1123,-2199,-2025,-12837,-10823,-12840,-12839,-12839,-12838]} 1. d4 d6 2. c4 g6 3. e4 Bg7 4. Nc3 Nf6 5. f3 O-O 6. Be3 c5 7. d5 a6 8. a4 e6 9. Nge2 exd5 10. cxd5 Nbd7 11. Ng3 Ne5 12. Be2 Bd7 13. O-O {A65: Modern Benoni: 6 e4.} b5 14. h3 Rb8 15. f4 {White has an edge.} Nc4 16. Bxc4 bxc4 17. e5 Ne8 18. Qd2 f5 {[#]} 19. Ra2 $146 (19. e6 $11) ({Predecessor:} 19. exf6 Qxf6 20. Rae1 Bf5 21. Rf3 Bd3 22. f5 Nc7 23. Nge4 Bxe4 24. Nxe4 Qxb2 25. f6 Qxd2 26. Bxd2 Bh8 27. Ref1 Nxd5 28. f7+ Kg7 29. Nxd6 h6 30. Nxc4 {½-½ (30) Valerga,D (2490)-Perez Ponsa,F (2497) Resistance/Saenz Pena 2013}) 19... dxe5 $15 20. Bxc5 Rf7 21. fxe5 Bxe5 22. Nge2 Nd6 23. Bd4 Qf6 24. Raa1 Re8 25. Bxe5 Qxe5 26. Rae1 Rfe7 27. Nf4 Qf6 ({Of course not} 27... Qxe1 28. Rxe1 Rxe1+ 29. Kh2 $16) 28. Rxe7 Qxe7 29. Qd4 Qe3+ 30. Qxe3 Rxe3 31. Kf2 Re8 32. Re1 Rxe1 33. Kxe1 $11 {[%mdl 4096] Endgame KBN-KNN} Kf7 34. Kd2 Kf6 35. Ke3 $1 Ke5 36. Nfe2 {[#] This costs White the game.} (36. Ne6 $1 $15) 36... g5 $1 $19 37. Ng1 {[#] Black should prevent Nf3+.} g4 38. hxg4 fxg4 39. Nge2 Nf5+ 40. Kf2 Ne7 41. Ke3 (41. d6 {was forced.} Nf5 42. a5) 41... Nxd5+ 42. Nxd5 Kxd5 {KB-KN} 43. Nc3+ $2 (43. a5) 43... Kc5 {Black is clearly winning.} 44. Ne4+ Kb4 45. Kd4 Bc6 46. Nf6 Bxg2 47. Nxg4 h5 48. Ne3 {[#]} h4 $1 {Weighted Error Value: White=0.83/Black=0.03} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "3.4"]
[White "Kocyigit, Buse Naz"]
[Black "Boricsev, Oleg"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "2143"]
[BlackElo "2234"]
[Annotator "TA"]
[PlyCount "37"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,37,13,-9,0,0,0,-28,-25,-28,-20,-20,-26,-22,-20,-33,-16,-25,-30,-16]} 1. Nf3 d5 2. d4 e6 3. c4 Nf6 4. Nc3 Be7 5. Bg5 O-O 6. e3 b6 7. Bd3 Bb7 8. O-O Nbd7 9. Qe2 h6 10. Bh4 Ne4 11. Bg3 Nxg3 {D58: Queen's Gambit Declined: Tartakower Defence.} 12. hxg3 Nf6 13. e4 dxe4 14. Nxe4 c5 15. dxc5 bxc5 16. Rad1 {[#] next Nxf6+ is good for White.} Qc7 $146 ({Predecessor:} 16... Qb6 17. b3 a5 18. Ne5 Rfd8 19. g4 a4 20. bxa4 Rxa4 21. Qc2 Rb4 22. a3 Rb2 23. Nxf6+ gxf6 {0-1 (42) Roj,M (2157)-Vrana,J (2219) Czechia 2009}) 17. Rd2 Rfd8 18. Rfd1 Nxe4 19. Bxe4 {Not much happened in this game.  Weighted Error Value: White=0.12/Black=0.03} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.02.28"]
[Round "3.5"]
[White "Anwesh, Upadhyaya"]
[Black "Sydoryka, Vladyslav"]
[Result "1-0"]
[ECO "A15"]
[WhiteElo "2364"]
[BlackElo "2331"]
[Annotator "TA"]
[PlyCount "191"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,191,20,16,65,66,70,77,70,44,85,46,77,77,197,170,186,181,168,173,251,242,375,379,361,297,383,383,360,345,343,324,483,484,477,472,419,375,736,348,316,313,273,242,629,632,624,625,581,371,391,377,362,370,371,295,287,301,321,321,307,307,313,313,308,297,232,0,274,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,244,252,248,253,1041,1043,1014,997,888,341,364,364,349,357,793,737,557,231,529,493,487,432,441,354,379,383,375,364,432,385,370,363,217,216,445,412,419,405,285,0,380,328,5414,5922,998,929,29976,29977,29979,29957,29972,29970,29972,29972,29981,29982,29984,29985,29996,29997,29997,29998,29998,29999]} 1. c4 Nf6 2. g3 e6 3. d4 d5 4. Nf3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Rd1 Bb7 11. Ne5 Rc8 12. Nc3 h6 {E08: Closed Catalan: Main Line: 7 Qc2.} 13. e4 dxe4 14. Nxe4 Nxe4 {White is better.} 15. Bxe4 {[#]} Bf6 $146 ({Predecessor:} 15... Nf6 16. Bg2 Bd6 17. Re1 Qe7 18. Rad1 Rfd8 19. a3 Bb8 {½-½ (59) Sadowski,M (2553)-Makovsky,P (2502) ICCF email 2009}) 16. Rd3 Bxe5 17. dxe5 Qc7 (17... Rc7 $16) 18. Rad1 $1 $18 Nc5 {[#]} 19. Bh7+ {[%mdl 512]} Kh8 20. Rd6 a5 (20... Rcd8 $142 21. Qd2 Rxd6 22. exd6 Qd7) 21. Be3 Na6 (21... Rb8 $142 22. Bxc5 bxc5) 22. Rd7 Qb8 23. Be4 (23. Bxb6 c5 $16) 23... Ba8 24. R1d6 c5 {[#]} 25. Bxh6 $1 {[%mdl 512]} Rc7 26. Rxc7 Qxc7 (26... Nxc7 $142 27. Bxa8 Qxa8) 27. Bxa8 Rxa8 28. Bg5 Qb7 29. a3 b5 $2 (29... Qf3 30. Rxb6 a4) 30. cxb5 (30. Qe2 $142) 30... Qxb5 31. Qe4 Nc7 32. Qc6 Qe2 $2 (32... Qxc6 33. Rxc6 Nd5 34. Rxc5 a4) 33. Qxc7 Qe1+ 34. Kg2 Qe4+ 35. f3 Qe2+ 36. Kh3 Qxf3 37. Rd8+ (37. Qxc5 Qf5+ 38. Kg2 Qxg5 $14) 37... Kh7 38. Rxa8 Qh5+ 39. Bh4 $1 Qf5+ 40. g4 Qf1+ 41. Kg3 Qg1+ 42. Kf3 $1 Qd1+ 43. Ke3 Qd4+ 44. Ke2 $1 Qxg4+ 45. Kd3 $2 (45. Kf1 $1 $18 Qf3+ 46. Kg1 Qd1+ 47. Kg2 (47. Kf2 Qd4+ 48. Kg3 Qd3+ 49. Kg4 Qe2+ 50. Kg5 Qe3+ 51. Kg4 Qe2+ 52. Kh3 Qf1+ 53. Kg4 Qe2+ $11) 47... Qd5+ 48. Kh3) 45... Qd4+ $1 $11 46. Kc2 Qc4+ 47. Kb1 Qd3+ 48. Kc1 Qc4+ 49. Kd2 Qd4+ 50. Ke2 Qc4+ 51. Kf3 Qd3+ 52. Kf4 Qd4+ 53. Kg3 Qe3+ 54. Kg2 Qe4+ 55. Kh3 Qf5+ 56. Kg3 Qd3+ 57. Kf2 Qd4+ 58. Kf1 Qd3+ $1 59. Kg1 Qb1+ 60. Kf2 Qxb2+ 61. Kf1 Qb5+ $1 62. Kg2 Qe2+ 63. Bf2 Qg4+ 64. Kf1 Qd1+ $2 (64... Qc4+ $1 $11 65. Kg1 Qg4+ 66. Kf1 Qd1+ 67. Be1 Qf3+ 68. Kg1 Qg4+ 69. Kf2 Qd4+ 70. Ke2 Qe4+ 71. Kf2 Qd4+ 72. Ke2 Qe4+ 73. Kd2 Qg2+ 74. Kc1 Qxa8 75. Qxf7 Qe4) 65. Be1 $18 Qf3+ {[#]} 66. Kg1 $1 Qe3+ $2 (66... Qxa8 67. Qxf7 Qe4) 67. Bf2 Qg5+ 68. Kh1 Qf5 {[#]} 69. Qxc5 $2 ({Weaker is} 69. Kg1 Qb1+ 70. Kg2 Qe4+ 71. Kg3 Qd3+ 72. Kg2 Qd5+ 73. Kg3 Qd3+ 74. Kf4 Qd2+ 75. Be3 Qxh2+ 76. Kf3 Qh5+ 77. Kg3 Qg6+ 78. Kh2 Qc2+ 79. Kh3 Qf5+ 80. Kh2 Qc2+ 81. Kg3 Qg6+ 82. Kh3 Qh5+ 83. Kg3 Qg6+ $16) (69. Qd8 $1) 69... Qf3+ 70. Kg1 Qxa8 71. a4 g5 $2 (71... Qd8 72. Qc2+ g6) 72. Qe7 Qf3 73. Qf6 (73. Qxg5 $142 {Qh4+ is the strong threat.} Qd1+ 74. Kg2 Qxa4 75. Kh3 Qb3+ 76. Qg3) 73... Qg4+ $2 (73... Qd1+ {was necessary.} 74. Kg2 Qg4+ 75. Bg3 Kg8) 74. Bg3 Qd1+ 75. Qf1 Qd4+ 76. Qf2 Qd1+ 77. Kg2 Kg8 78. Qe3 Qxa4 79. Qxg5+ Kf8 80. Bf2 {White wants to mate with Bc5+.} Qe4+ 81. Kg3 {Intending Bc5+ and mate.} Qd5 $2 (81... Qd3+ 82. Qe3 Qg6+ 83. Kf3 Qh5+ 84. Kg3 Qg6+ 85. Kh3 Qf5+ 86. Kg2 Qg6+ 87. Kf1 Kg8) 82. Qe3 Kg8 83. Qd4 {aiming for Qxd5.} Qb3+ 84. Qe3 Qd5 $1 85. Be1 a4 $2 (85... Kf8 86. Bc3 Kg8) 86. Bb4 Qd8 87. Bd6 Qa5 88. Kg4 {White mates.} Qb5 89. Kg5 Qb1 90. Kf6 Qf5+ 91. Ke7 Qh5 92. Qg3+ Kh8 93. Kf8 {[%csl Gf8][%cal Rg3g8]} Qh7 94. Qg5 Qg6 95. Qh4+ {[%mdl 64] Double Attack} Qh7 96. Qf6+ {[%mdl 64] Double Attack.  Weighted Error Value: White=0.22/Black=0.25} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.01"]
[Round "4.1"]
[White "Kozak, Leonid"]
[Black "Sydoryka, Vladyslav"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2244"]
[BlackElo "2331"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,62,0,-8,0,-8,27,11,48,3,0,-29,-25,-31,-22,-22,23,-35,-29,-19,-22,-23,-23,-23,-23,-25,-35,-25,-24,-30,-8,-18,0,-52,-22,-28,-20,-33,-20,-41,-22,-37,-20,-36,-24,-195,-175,-325,-332,-657,-644,-845,-837,-827,-812]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 d5 5. e3 O-O 6. Nf3 Be7 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} 7. Rc1 a6 8. Qc2 Nbd7 {[#] The position is equal.} 9. cxd5 $146 ({Predecessor:} 9. a4 c5 10. cxd5 exd5 11. Be2 b6 12. O-O Bb7 13. Rfd1 Re8 14. Ne5 Rc8 15. Bf3 {0-1 (67) Harikrishna,P (2731)-Carlsen,M (2870) Kolkata 2019}) 9... exd5 10. Qb3 c6 11. Bd3 Bd6 12. O-O Re8 13. Qc2 (13. e4 $11 Nxe4 14. Nxe4 (14. Bxe4 dxe4 15. Ng5 {[%mdl 64] Double Attack} Re7 $11) 14... dxe4 15. Ng5 {[%mdl 64] Double Attack}) 13... Qe7 14. e4 dxe4 15. Nxe4 Nxe4 16. Bxe4 Nf6 ({Reject} 16... Qxe4 $6 17. Rfe1 $16) 17. Bd3 h6 18. Rfe1 Be6 19. h3 Bc7 20. a3 Qd7 21. Be3 (21. Re2 $11) 21... Rad8 22. Ne5 Qd6 23. Rcd1 Nd5 24. Bc1 Qe7 25. Bh7+ Kh8 26. Be4 Qf6 27. f4 $2 {Now White is beyond hope.} (27. Bd2 $11) 27... Nxf4 $19 28. Rf1 {[#]} (28. Be3 $142) 28... Rxd4 $3 {[%mdl 512]} 29. Rxd4 (29. Bxf4 Rxd1 30. Qxd1 Bxe5 31. Bxe5 Qxe5 {[%mdl 64] Double Attack} 32. Bf3) 29... Qxe5 {Black is clearly winning.} ({Less strong is} 29... Bxe5 30. Rdd1 $17) 30. Rdd1 Nh5 31. g4 Bb6+ {Weighted Error Value: White=0.52/Black=0.09} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.01"]
[Round "4.2"]
[White "Boricsev, Oleg"]
[Black "Anwesh, Upadhyaya"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2234"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,27,0,0]} 1. e4 {Fernandez,D} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+ 8. Nbxd2 d5 9. exd5 Nxd5 10. Qb3 Na5 11. Qa4+ Nc6 12. Qb3 Na5 13. Qa4+ Nc6 14. Qb3 {[#]} {Predecessor:} Nce7 $146 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 15. O-O O-O 16. Rfe1 c6 17. Ne4 Nb6 18. Bd3 Ned5 19. Nc5 Nf6 20. Rac1 Rb8 21. Qa3 a6 22. Qb3 Qc7 23. Ne4 Nfd5 24. Nc3 Qd6 25. Be4 {½-½ (36) Jones,G (2640)-Karjakin,S (2753) Wijk aan Zee 2018 CBM 183 [Fernandez,D]} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.01"]
[Round "4.3"]
[White "Kushko, Dmitriy"]
[Black "Kocyigit, Buse Naz"]
[Result "1-0"]
[ECO "E62"]
[WhiteElo "2285"]
[BlackElo "2143"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,119,27,20,20,16,32,23,43,45,66,64,85,66,85,80,83,81,98,92,72,68,149,75,58,28,82,66,56,46,77,60,75,60,65,65,76,75,70,72,143,141,133,142,259,254,377,382,418,418,418,416,410,418,410,410,410,403,403,403,435,429,429,423,414,400,403,398,521,519,635,612,1348,1171,1664,1625,1557,1463,1494,1182,29967,29969,29974,29975,29975,29976,29976,29977,29977,29978,29978,29979,29979,29980,29980,29980,29980,29981,29979,29975]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 O-O 5. O-O d6 6. d4 c6 7. Nc3 Qa5 8. e4 e5 9. h3 Nbd7 10. Re1 exd4 11. Nxd4 Ne5 12. Bf1 Qb6 {[#] And now ...Qxd4! would win. is more profitable than 12...Re8 at the moment. E69: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4 c6 9 h3.} 13. Be3 c5 $1 {[%cal Rc5d4]} ({Don't go for} 13... Qxb2 $2 14. Na4 $18) 14. Nc2 Be6 {White has an edge.} 15. b3 Nfd7 {Threatening ...Nxc4.} 16. Nd5 {[#]} Qd8 $146 ({Predecessor:} 16... Bxd5 17. cxd5 Nf6 18. f4 Ned7 19. Bf2 Rfe8 20. Qf3 Qa5 21. a4 Nxe4 22. Rxe4 Rxe4 23. Qxe4 Bxa1 24. Nxa1 {½-½ (33) Alshameary Puente,I (2352)-Oratovsky,M (2474) Maia 2018}) 17. Nf4 Re8 18. Bg2 Nf8 19. Qd2 Qd7 20. Rad1 Rad8 21. Kh2 b5 (21... Qc7 $14) 22. cxb5 (22. Nxe6 $142 fxe6 23. f4) 22... Qxb5 $16 23. Nd5 Rc8 (23... Bxd5 $11 {keeps the balance.} 24. Qxd5 Qa6) 24. Bg5 Bxd5 25. exd5 c4 26. Na3 Qa6 27. Nxc4 Nxc4 28. bxc4 Rxe1 {White stays focused until the end.} 29. Rxe1 Qxc4 {Strongly threatening ...Bc3.} 30. Re7 Rb8 ({Black should try} 30... Be5) 31. Qf4 Qxf4 32. Bxf4 ({Worse is} 32. gxf4 h6 $15) 32... Bd4 (32... Rb6 $16 {is a better defense.} 33. Be3 (33. Rxa7 Bd4 $16) 33... Ra6) 33. Bxd6 $18 Rd8 (33... Rc8 $142 34. f4 h5) 34. Bc7 Rd7 35. d6 {aiming for Bc6.} Bc5 {[#]} 36. Rxd7 Nxd7 {[%mdl 4096] Endgame KBB-KBN} 37. Bc6 Ne5 38. Ba4 Bxf2 39. d7 Nxd7 40. Bxd7 Bc5 41. Kg2 Bb4 42. Kf3 Kf8 43. Bd8 f5 44. Be6 Be1 45. Bf6 h6 46. a4 a5 47. g4 fxg4+ 48. Kxg4 Bd2 49. Kf3 h5 50. Ke4 g5 51. Kf5 {White mates.} g4 52. hxg4 hxg4 53. Kxg4 Ke8 54. Kf5 Be1 55. Ke4 Bd2 56. Kd5 Bb4 57. Kc6 Be1 58. Bd7+ Kf7 59. Bd8 Bd2 60. Kb5 {Weighted Error Value: White=0.05/Black=0.52} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.01"]
[Round "4.4"]
[White "Bondar, Dmytro"]
[Black "Vakulenko, Oleksandr"]
[Result "1-0"]
[ECO "C58"]
[WhiteElo "2254"]
[BlackElo "2256"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,85,27,24,43,39,45,-37,45,29,52,32,37,37,47,34,113,114,112,110,216,207,229,227,221,214,258,262,262,264,254,259,253,251,266,218,220,194,223,185,300,289,305,231,265,219,266,252,285,290,265,199,573,576,512,513,579,618,538,450,449,404,860,860,859,856,799,748,1064,964,1194,1457,29987,29988]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Bd3 Nd5 {C58: Two Knights: 4 Ng5 d5 5 exd5 Na5 sidelines.} 9. h4 h6 {[#]} 10. Nf3 ({White should play} 10. Qh5 $1 $14 Qf6 11. Nh7 {[%mdl 64] Decoy}) 10... Nf4 (10... Bd6 $15) 11. Bf1 $14 Bg4 {Strongly threatening ...e4.} 12. d3 {[#]} Be7 $146 ({Predecessor:} 12... Qf6 13. Nbd2 Rd8 14. g3 Ne6 15. Bg2 Nd4 16. c3 Nxf3+ 17. Bxf3 Bxf3 18. Qxf3 Nb7 {1-0 (79) Yao,L (2207)-Wan,Q (1601) Zhongshan 2015}) 13. Nbd2 f5 14. g3 e4 {White now steadily converts the win.} 15. gxf4 $16 exf3 16. Nxf3 Bb4+ (16... O-O $16 {was called for.}) 17. c3 $18 Qe7+ 18. Be3 Bd6 19. Be2 Bxf4 20. Bxf4 Bxf3 {[#]} 21. Rh3 {[%cal Rh3f3]} Bxe2 22. Qxe2 Qxe2+ 23. Kxe2 Kf7 24. b4 Nb7 25. a4 Nd8 26. d4 a6 (26... g6 $142 27. b5 Ne6) 27. Be5 Rg8 28. c4 Ra7 29. Rb1 Rb7 30. b5 cxb5 31. axb5 Nc6 32. f4 Rc8 $2 (32... axb5 {is tougher.} 33. Rxb5 (33. cxb5 Re8 $16) 33... Re7) 33. bxc6 Rxb1 {[%mdl 4096] Endgame KRR-KRB} 34. d5 Rb4 35. Rg3 g6 36. Ra3 Rxc4 37. Rxa6 Rc5 (37... Kf8 $142 38. Kd3 Rc1) 38. Ra7+ Kg8 39. Rg7+ Kf8 40. Rh7 Re8 41. c7 {And now d6 would win.} g5 42. Kf3 gxf4 43. Bd6+ {Weighted Error Value: White=0.21/Black=0.68} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.01"]
[Round "4.5"]
[White "Okhotnik, Vladimir"]
[Black "Gavrish, Leonid"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2350"]
[BlackElo "2085"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,123,21,22,18,20,14,12,0,0,-18,-16,-27,-30,-41,-40,-68,-38,-33,-34,-35,-28,-29,-30,-35,-32,-34,-33,-34,-34,-32,-34,-34,-30,-32,-25,-33,-7,-11,-7,-7,0,0,0,-7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-3,0,0,0,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,0,77,77,373,373,1474,1334,29976,29977,29984,29985,29985,29986]} 1. Nc3 d5 2. d4 Bf5 3. Nf3 Nf6 4. Nh4 e6 5. Nxf5 exf5 {[#]} 6. Qd3 $146 {D00: 1 d4 d5: Unusual lines.} ({Predecessor:} 6. Bg5 Be7 7. Qd3 Qd6 8. g3 Nc6 9. a3 O-O 10. Bh3 Ne4 11. Bxe7 Nxe7 12. Rd1 {1-0 (27) Langevin,P (2221)-Dubois,M (2029) Hyeres 2001}) 6... Qd7 7. f3 Nc6 8. Bg5 {The position is equal.} Be7 9. O-O-O {[#]} Ne4 $1 10. Nxe4 dxe4 11. Qd2 {[#]} Qxd4 $1 12. fxe4 O-O-O (12... fxe4 {is more complex.} 13. g3 g6 14. Bh3 f5 15. Be3 Qxd2+ 16. Bxd2 O-O) 13. Bxe7 Qxd2+ 14. Rxd2 Nxe7 15. Rxd8+ Rxd8 16. exf5 Nxf5 $15 {[%mdl 4096] Endgame Strongly threatening ...Ne3. KRB-KRN} 17. e4 Ne3 {[%csl Ge3][%cal Rd8d1]} 18. Bd3 Ng4 19. Rf1 Ne5 20. Kd2 Kd7 21. Ke3 Ke6 22. Be2 c5 23. h3 g6 24. g4 f6 25. h4 h6 26. Rg1 a6 27. a4 Rd4 28. b3 Rd7 29. a5 Rd8 30. c3 Rd7 31. h5 Rg7 {White must now prevent ...gxh5.} 32. Rh1 gxh5 33. Rxh5 Nxg4+ 34. Kf4 Ne5 35. Rxh6 Rg2 36. Ke3 Rg3+ 37. Kd2 Nc6 38. Bc4+ Ke5 39. Bd5 Nxa5 40. Rh7 Rg2+ 41. Kd3 Rg3+ 42. Kc2 Rg2+ 43. Kd3 Kf4 44. Rf7 Rg3+ 45. Kc2 Rg2+ 46. Kb1 Rg6 47. b4 cxb4 48. cxb4 Nc6 49. Rxb7 Nd4 50. Rb6 Rg1+ 51. Kb2 Rg2+ 52. Kc1 Rg1+ 53. Kd2 Rg2+ 54. Kd3 Ke5 55. Rxa6 {next Ra5 is good for White.} f5 56. exf5 Rg3+ (56... Nc2 $1 $11) 57. Kc4 $16 {aiming for f6.} Rg4 $2 {[%mdl 8192] [#] A mistake that costs the game.} (57... Rg1 $16 {might work better.}) 58. Kc5 $1 $18 Rf4 $2 (58... Rg7 59. Rg6 Rd7) 59. f6 Rf2 60. f7 {White mates.} Rc2+ 61. Bc4 Nb3+ 62. Kb6 {Weighted Error Value: White=0.01/Black=0.24} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "5.1"]
[White "Gavrish, Leonid"]
[Black "Kozak, Leonid"]
[Result "0-1"]
[ECO "E98"]
[WhiteElo "2085"]
[BlackElo "2244"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 36,75,49,38,73,68,83,93,116,140,227,12,24,-45,56,50,61,0,0,-326,-300,-298,-315,-302,-294,-276,-227,-230,-228,-502,-501,-1031,-893,-1862,-1935,-1658,-1694,-29988,-29989,-29999,1226,1151]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 Nf6 12. c5 f4 13. Bd2 g5 14. Rc1 Ng6 15. cxd6 cxd6 16. Nb5 Rf7 17. Qc2 Ne8 18. a4 h5 19. Nf2 a6 {E99: King's Indian: Classical Main Line: 9 Ne1 Nd7 10 f3 f5.} 20. Na3 Bd7 21. Nc4 {[#]} g4 $146 {White is better.} ({Predecessor:} 21... b6 22. a5 b5 23. Nb6 Ra7 24. Nd3 Rc7 25. Qb3 Bc8 26. Nb4 Rxc1 27. Rxc1 Bb7 {1-0 (42) Romizin,N (2374)-Bennett,H (2290) ICCF email 2007}) 22. fxg4 Nh4 (22... hxg4 $16 23. Nxg4 (23. Bxg4 Bxg4 24. Nxg4 b5 $16) 23... Rc8) 23. Qb3 $2 (23. gxh5 $18 Bh6 24. Ng4 Bxg4 25. Bxg4) 23... b5 $11 {[#]} 24. Na5 (24. gxh5 bxc4 25. Rxc4 Rb8 $17) (24. Ba5 $1 $11 Qg5 25. Nb6 hxg4 26. g3 (26. Nxa8 $2 {loses.} f3 $19) 26... bxa4 27. Qc3 (27. gxh4 $2 Qxh4 28. Qc2 g3 $19) 27... Nf3+ 28. Bxf3 gxf3 29. Qxf3 (29. Nxa8 $2 fxg3 30. Ng4 Qxg4 $19)) 24... bxa4 (24... Qg5 $15) 25. Qh3 Bh6 26. Nc6 (26. Rc2 $14) 26... Qf6 {And now ...f3 would win.} 27. Nd3 $2 {[%mdl 8192]} (27. Rc2 $11 {and White is okay.}) 27... hxg4 $19 28. Bxg4 Bxg4 29. Qxg4+ Rg7 30. Qd1 Rxg2+ 31. Kh1 Qg7 {( -> ...Rxh2+!)} 32. Rg1 $2 (32. Ne1) 32... Nf6 33. Nf2 (33. Ne7+ $142 Kh7 34. Nf5 Rxg1+ 35. Qxg1 Qxg1+ 36. Kxg1 Nf3+ 37. Kh1 Nxd2 38. Rc7+ Kg6 39. Nxd6) 33... Kh7 {Hoping for ...Rg8.} 34. Qf1 f3 35. Bxh6 Qxh6 36. Ne7 Qf4 {[%csl Gf4][%cal Rg2h2][%mdl 64] [#] Double Attack} 37. Nd3 Rf2 $4 {[%mdl 8192]} 38. Nxf2 {[%mdl 32768] Weighted Error Value: White=1.47/Black=0.27. Loss on time!?} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "5.2"]
[White "Vakulenko, Oleksandr"]
[Black "Okhotnik, Vladimir"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "2256"]
[BlackElo "2350"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,66,14,33,10,48,39,49,29,41,33,43,0,0,-28,0,4,0,0,0,0,0,0,16,23,17,8,8,6,3,0,4,0,22,-40,-43,-98,-99,-90,-93,-118,-109,-128,-108,-377,-330,-498,-503,-560,-557,-781,-806,-739,-722,-713,-715,-879,-884]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Nb6 6. Nf3 Bg7 7. Bf4 {D90: Grünfeld: 4 Nf3 Bg7 sidelines.} c5 8. dxc5 Bxc3+ 9. bxc3 {White is slightly better.} Qxd1+ 10. Rxd1 Na4 11. e3 {[#] aiming for Bxb8.} Nd7 $146 ({Predecessor:} 11... Nxc5 12. Be5 f6 13. Bd4 Na4 14. c4 Nc6 15. Be2 e5 16. Ba1 Be6 17. O-O Kf7 {0-1 (51) Faizrakhmanov,R (2434)-Huzman,A (2567) Moscow 2019}) 12. Nd4 Naxc5 13. Nb5 {Black must now prevent Nc7+.} Ne6 14. h4 (14. Be2 {is more complex.} O-O 15. Bh6 Re8 16. O-O Ndc5 17. c4) 14... a6 15. Nc7+ Nxc7 16. Bxc7 b6 17. h5 g5 18. h6 Ra7 19. Bg3 Nc5 20. Rb1 (20. Rd4 {seems wilder.} Be6 21. Be2 b5 22. O-O Rd7 23. Rfd1) 20... b5 21. f3 Rb7 22. a3 ({White should try} 22. c4 $11 bxc4 23. Rxb7 Bxb7 24. Bxc4) 22... Be6 $15 23. Kf2 (23. Be2 $15) 23... f6 $17 24. Rb4 Kf7 25. Be2 Rc8 26. Rhb1 Rd7 27. f4 $2 {[%mdl 8192] This costs White the game.} (27. Rd4 $17) 27... a5 28. Bh5+ (28. Rxb5 {only move.} Ne4+ {[%mdl 64] Double Attack, Discovered Attack} 29. Kf3 Nxc3 30. fxg5 Nxb1 31. Rxb1) 28... Kf8 $19 {Black is clearly winning.} 29. Rxb5 Ne4+ {[%mdl 64] [#] Double Attack, Discovered Attack} 30. Kf3 g4+ 31. Bxg4 Nd2+ {[%mdl 64] Double Attack} 32. Kf2 Bxg4 33. Rb8 Rdd8 {Weighted Error Value: White=0.62/Black=0.06} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "5.3"]
[White "Kocyigit, Buse Naz"]
[Black "Bondar, Dmytro"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2143"]
[BlackElo "2254"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,60,42,24,46,43,39,35,60,38,125,23,91,43,60,37,46,30,43,-112,0,0,0,-155,0,-209,-197,-201,0,0,0,0,0,0,101,14,17,-35,52,-1120,-1107,-2185,-2100,-29967,-5701,-1937,-1243,-2050,-1956]} 1. Nf3 Nf6 2. d4 c5 3. c4 cxd4 4. Nxd4 e5 5. Nb5 d5 6. cxd5 Bc5 7. N5c3 O-O 8. g3 Qb6 $1 {A31: Symmetrical English: 2 Nf3 Nf6 3 d4.} 9. e3 Bg4 {9...Bf5 injects fresh life into this line.} 10. Be2 Bh3 {White is slightly better.} 11. Rg1 {And now g4 would win.} Bf5 {[#]} ({Black should play} 11... h5 $14) 12. Nd2 $146 (12. g4 $16 Bg6 13. a3) ({Predecessor:} 12. a3 Rd8 13. Nd2 e4 14. Nc4 Qc7 15. b4 Bf8 16. Qb3 Nxd5 17. Nb5 Qd7 18. Nd4 {1-0 (45) David,V (2396)-Sandalakis,A (2363) France 2008}) 12... Rd8 (12... Bb4 $11) 13. g4 Bg6 14. Nc4 {[%mdl 64] Double Attack} Qc7 15. g5 Ne4 16. Nb5 $2 (16. Bd2 $14 {was forced to keep a grip.}) 16... Bb4+ (16... Qe7 $1 $17 17. f3 a6 $1) 17. Kf1 $11 Qc5 18. Qa4 (18. a3 $11 Qxb5 19. axb4 Rxd5 20. Qb3) 18... a6 $2 ({Stronger than} 18... Rxd5 19. a3 $1 $11) (18... Bf5 $1 $17 {Threatens to win with ...Bh3+.} 19. Kg2 Nxg5) 19. Nxe5 $2 (19. a3 $1 $11 {and White has nothing to worry.} Be1 20. Kxe1) 19... axb5 $19 20. Qxa8 {[#]} Qxd5 (20... Nc6 $1 $19 {[%mdl 512]} 21. Qxb7 (21. Nd3 Qe7) 21... Nxe5 22. Qxb5 Qxb5 23. Bxb5 Rxd5) 21. Nxg6 $11 hxg6 22. Qa7 {Strongly threatening Qd4!} Bc5 23. Qa5 b4 (23... Nc6 $11 {keeps the balance.} 24. Qc7 (24. Qe1 $2 Bb4 $19) 24... Nxg5) 24. Qa4 (24. Qb5 $16) 24... Nc6 25. a3 ({Better is} 25. Rg2 $11) 25... bxa3 (25... Qf5 $15 26. Rg2 bxa3) 26. Qc4 $2 {[%mdl 8192] White does not recover from this.} (26. Rg4 $14 Nd2+ 27. Bxd2 axb2 28. Rd1) 26... Qf5 $19 {[%csl Ge4][%cal Rf5f2]} 27. f3 axb2 28. Rb1 bxc1=Q+ (28... bxc1=R+ $142 29. Qxc1 Ne5 30. Ke1 Nd2 31. Qxd2 Qxb1+ 32. Kf2 {[#]} Qxg1+ $3 {[%mdl 512]} 33. Kxg1 Rxd2 34. Kf1 Bxe3 35. h3 Nd3 36. Bxd3 Rxd3 37. Ke2 Rc3 38. h4 b5 39. f4 Bxf4 40. Kf2 b4 41. Kg2 b3 42. h5 b2 43. hxg6 b1=Q 44. gxf7+ Kf8 45. Kf2 Qb2+ 46. Kg1 Rc1#) 29. Qxc1 Nd2+ 30. Kf2 Nxb1 {Weighted Error Value: White=1.39/Black=0.79} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "5.4"]
[White "Anwesh, Upadhyaya"]
[Black "Kushko, Dmitriy"]
[Result "1/2-1/2"]
[ECO "A41"]
[WhiteElo "2364"]
[BlackElo "2285"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,77,20,14,11,22,32,20,23,23,20,32,20,10,0,0,0,0,0,0,-22,-16,-18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d6 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. c4 Nc6 7. Nc3 Rb8 8. h3 a6 9. e4 b5 10. cxb5 axb5 11. Re1 e5 12. dxe5 Nxe5 13. Nxe5 dxe5 14. Bg5 {[#] E63: King's Indian: Fianchetto: Panno Variation with 7...a6.} Qxd1 $146 ({Predecessor:} 14... c6 15. Qc2 Be6 16. b3 Qc8 17. Kh2 h6 18. Be3 Nd7 19. Red1 Re8 20. Qd2 Kh7 21. Rac1 Qb7 {0-1 (44) Chetverik,M (2272)-Savitskiy,S (2367) Pardubice 2012}) 15. Rexd1 Be6 16. Nd5 Nxd5 17. exd5 Bd7 18. Rac1 Rfc8 {The position is equal.} 19. Rd2 f6 20. Be3 Bf8 $1 21. Rdc2 Bd6 22. b4 Kf7 23. Bc5 Ra8 (23... Ke7 {looks sharper.} 24. Rc3 Ra8 25. a3 f5 26. Bf1 Ra6) 24. Bxd6 cxd6 25. Rxc8 $1 Rxc8 26. Rxc8 Bxc8 $11 {[%mdl 4096] Endgame KB-KB} 27. Bf1 Bd7 28. f4 Ke7 29. Kf2 Kd8 30. Ke3 Kc7 31. h4 h5 32. Bd3 f5 33. Bc2 e4 34. Kd4 Kb6 35. Bd1 Kc7 36. Bb3 Kb6 37. Bc2 Kc7 38. Bb3 Kb6 39. Bc2 {An uneventful encounter.  Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "5.5"]
[White "Sydoryka, Vladyslav"]
[Black "Boricsev, Oleg"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2331"]
[BlackElo "2234"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,62,81,56,53,53,41,44,47,56,64,70,30,34,35,77,70,97,56,76,79,93,22,13,0,0,0,0,0,0,0,0,-298,-219,-290,-251,-29988,-29989,-29989,-29990,-29991,-29992]} 1. c4 c5 2. g3 Nc6 3. Bg2 b6 4. b3 Bb7 5. Bb2 Nf6 6. Nf3 e6 7. O-O d5 8. cxd5 exd5 9. d4 Be7 10. Nc3 O-O 11. dxc5 bxc5 12. Rc1 Rc8 13. Na4 {D30: Queen's Gambit Declined: Systems without Nc3.} Nb4 14. a3 Na6 15. Ne5 {[#] White is slightly better.} Qc7 $146 ({Predecessor:} 15... Re8 16. Nc3 Bd6 17. Nc4 Bb8 18. Ne3 Be5 19. Nc4 Bb8 20. Nd2 Bc6 21. Na2 Qe7 22. Re1 Be5 23. Bxe5 Qxe5 24. Qc2 Bd7 25. e4 d4 26. Nc4 Qe7 27. e5 {1-0 (27) Henrich,D (2039)-Hendrich,D (1757) Eschborn 2014}) 16. e3 Rfd8 17. Nf3 Qb8 18. Bh3 d4 19. exd4 Qa8 20. Nd2 {Qe2 is the strong threat.} ({Much less strong is} 20. Bxc8 Bxf3 21. Qd3 Rxc8 $16) 20... Rc7 $1 21. Qe2 {Black must now prevent dxc5.} Bf8 22. Rfd1 (22. d5 $16 {aiming for Bxf6.} Re7 23. Qc4) 22... cxd4 $11 23. Rxc7 Nxc7 24. Qc4 Ne6 25. Bxe6 fxe6 26. Qxe6+ Kh8 27. Nf1 $2 {[%mdl 8192]} (27. Qc4 $11 {and White has nothing to worry.}) 27... Bh1 $19 {[%csl Gh1][%cal Ra8g2]} 28. Qh3 {[#]} Ne4 $1 $40 {[%cal Re4g5][%mdl 128] ( -> ...Ng5). Black goes for the king.} 29. g4 $2 (29. Rxd4 Ng5 30. Ne3 Nxh3+ 31. Kf1 Rxd4 32. Bxd4 Qe4 33. Ke1 Qxd4 34. Nf1 Bxa3 35. Nd2 Bb4 36. Nc3 Bxc3 37. f4 Qxd2+ {[%mdl 64] Double Attack} 38. Kf1 Bg2#) (29. Nd2 $19 Nxd2 30. Rxd2) (29. Nd2 Ng5) 29... Ng5 {[%cal Rg5h3] Black mates.} 30. Qg3 Bd6 31. f4 {[#]} Bxf4 $1 {[%mdl 512] Weighted Error Value: White=0.65/Black=0.05} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "6.1"]
[White "Kozak, Leonid"]
[Black "Boricsev, Oleg"]
[Result "1/2-1/2"]
[ECO "D14"]
[WhiteElo "2244"]
[BlackElo "2234"]
[Annotator "TA"]
[PlyCount "32"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,21,0,0]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nf3 Nc6 5. Nc3 Nf6 6. Bf4 Bf5 7. e3 e6 8. Bd3 Bxd3 9. Qxd3 Bd6 10. Bxd6 Qxd6 11. O-O {[#]} {Predecessor:} O-O $146 {D14: Slav Defence: Exchange variation with ...Bf5.} 12. Rfc1 Rfc8 13. Ne2 Ne7 14. Nc3 Nc6 15. Ne2 Ne7 16. Nc3 Nc6 {½-½ (16) Amin,B (2695)-Adly,A (2615) Tornelo INT 2021} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "6.2"]
[White "Kushko, Dmitriy"]
[Black "Sydoryka, Vladyslav"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2285"]
[BlackElo "2331"]
[Annotator "TA"]
[PlyCount "148"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,148,15,10,-2,11,11,15,10,25,30,36,14,23,24,20,13,50,54,47,37,58,57,55,42,58,8,40,0,0,0,0,0,0,0,0,-25,-14,-23,-3,-18,0,-11,0,-43,2,-22,-13,-14,43,56,239,243,224,221,505,485,467,468,566,468,576,386,386,255,308,230,332,281,265,223,227,227,227,239,229,193,240,163,249,177,178,110,141,149,150,138,235,217,222,202,198,101,123,129,293,321,320,318,407,410,397,403,399,312,287,0,397,377,1069,1034,1006,627,613,611,781,514,514,514,514,514,441,59,65,8,12,0,80,96,100,0,20,0,12,0,18,12,12,0,42]} 1. g3 d5 2. Bg2 c6 3. Nf3 Bg4 4. h3 Bh5 5. O-O Nd7 6. d3 Ngf6 7. Qe1 {7.c4 is more advanced technology. A07: Réti Opening: New York and Capablanca Systems.} e5 8. e4 dxe4 9. dxe4 Bc5 10. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} O-O 11. Nh4 Re8 12. Na3 Qc7 13. Bd2 {[#]} Nb6 $146 ({Predecessor:} 13... Rad8 14. b4 Bf8 15. Nc4 b5 16. Nb2 a6 17. c4 c5 18. axb5 axb5 19. cxb5 Qb7 {½-½ (47) Bracker,F (2391)-Solodovnichenko,Y (2568) Rome 2017}) 14. a5 Nc8 15. Nf5 Nd7 16. b4 Bf8 17. c4 Rb8 18. Kh2 f6 19. Bc3 b6 20. a6 Nd6 21. Ne3 Bf7 22. Qe2 Rbd8 23. Nac2 Bg6 24. f3 Bf7 25. h4 Be6 26. Rfc1 Nb8 27. Be1 g6 28. c5 Nb5 29. cxb6 axb6 {[#]} (29... Qxb6 $11 30. Bh3 Nxa6) 30. Nd5 $1 $14 Bxd5 (30... Qf7 $1 $14) 31. exd5 $18 Na7 32. dxc6 b5 $2 (32... Qxc6 33. Na3 Qd7) 33. Na3 Nbxc6 34. Nxb5 Qb8 35. Rxc6 Nxb5 36. Rxf6 Kg7 37. a7 Nxa7 38. Qa6 Rd7 (38... Nc8 $142 39. Rc6 Ne7) 39. h5 Qd8 40. Rb6 {And now Bh3 would win.} Nc8 41. Rb7 Rxb7 42. Qxb7+ Re7 43. Qe4 {Black must now prevent Bc3.} Nd6 44. Qg4 Qc7 (44... Qb6 {might work better.} 45. Ra2 Qd4) 45. Qg5 Nf7 46. Qh4 (46. Qe3 $18) 46... Re6 47. b5 gxh5 48. Ra6 (48. Qxh5 $2 Rh6 $19) 48... Bd6 {[#]} (48... Rg6 $16 {was necessary.}) 49. Rc6 $1 {[%cal Rc6c7]} ({Not} 49. Qxh5 $2 Rh6 $19) 49... Qb7 50. Qc4 ({But not} 50. Qxh5 $2 Rh6 $19) 50... Rg6 51. Bf2 (51. f4 $18 h4 52. f5 hxg3+ 53. Kg1 (53. Bxg3 Rh6+ 54. Kg1 Qd7 $18)) 51... h4 $16 52. gxh4 {aiming for h5.} Qe7 $2 (52... e4+ $16 {was worth a try.} 53. Kh1 exf3 54. Bxf3 Qd7) 53. Kh1 $18 e4 54. Qxe4 Re6 55. Bd4+ Kh6 56. Be3+ $1 Kg7 57. Qg4+ Rg6 58. Qe4 Re6 $1 {[%cal Re6e4] [#]} 59. Qd4+ Kg8 $2 (59... Qf6 60. f4 Qxd4 61. Bxd4+ Kf8) 60. Rc8+ Nd8 61. Qg4+ Rg6 62. Qc4+ Kf8 63. Bg5 Rxg5 64. hxg5 Qxg5 65. Qg4 Qf6 {( -> ...Qa1+)} 66. Rxd8+ $2 Qxd8 $14 67. Qf5+ (67. Qd4 $14) 67... Kg7 $11 68. Qg4+ (68. Bf1 {is interesting.} Qh4+ 69. Qh3 Qf6 70. Qh5 Qf4 71. Qg4+) 68... Kh8 (68... Kf8 $11 {keeps the balance.}) 69. Qd4+ $16 Kg8 70. Qg4+ (70. Bf1 $16 {Bc4+ would kill now.} Kf7 71. Qd5+ Kf8 72. Kg2) 70... Kf8 $11 {The position is equal.} 71. Qf5+ Kg7 72. Qg4+ Kh6 73. Qe6+ Kg7 74. Qg4+ Kf8 {Black defended with fortune.  Weighted Error Value: White=0.29/Black=0.30} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "6.3"]
[White "Bondar, Dmytro"]
[Black "Anwesh, Upadhyaya"]
[Result "0-1"]
[ECO "C74"]
[WhiteElo "2254"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "46"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,46,18,20,12,20,9,37,1,5,4,4,-8,31,0,0,0,8,-20,-18,-25,-15,-64,-46,-403,-402,-418,-423,-463,-290,-318,-308,-311,-307,-545,-540,-521,-370]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. d3 Nf6 7. O-O {C74: Ruy Lopez: Deferred Steinitz: 5 c3 f5.} fxe4 8. dxe4 Be6 {[#]} ({Much worse is} 8... Nxe4 $6 9. Nxe5 $1 {[%mdl 512]} dxe5 10. Qh5+ Ke7 11. Bxc6 $16) 9. Qd3 $146 {White is slightly better.} ({Predecessor:} 9. Nbd2 Be7 10. Ng5 Bg8 11. Bb3 Qd7 12. f4 exf4 13. Rxf4 h6 14. Nh3 O-O-O 15. Qe2 {1-0 (35) Muehlhan,K (1986)-Hesselbarth,K (1789) Berlin 2011}) 9... Be7 10. Ng5 Bg8 11. f4 Nd7 12. Bxc6 (12. Qg3 {is interesting.} Bxg5 13. fxg5 Bc4 14. Rf2 Qe7 15. Be3) 12... bxc6 13. Nf3 Bf7 14. fxe5 Nxe5 15. Nxe5 dxe5 16. Qg3 O-O 17. Bh6 $2 {[%mdl 8192] [#] This costs White the game.} (17. Nd2 $15) 17... Bg6 $1 $19 {( -> ...Rxf1+)} 18. Rxf8+ Bxf8 19. Bd2 Bxe4 20. Qe3 Qd5 21. c4 Qxc4 {Strongly threatening ...Bc5!} 22. Na3 $2 (22. b3 Qd4 23. Nc3) 22... Qd5 {...Bc5! is the strong threat.} 23. Rc1 Bxg2 {Weighted Error Value: White=0.72/Black=0.20} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "6.4"]
[White "Okhotnik, Vladimir"]
[Black "Kocyigit, Buse Naz"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "2350"]
[BlackElo "2143"]
[Annotator "TA"]
[PlyCount "159"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,159,5,15,0,0,-16,25,17,14,0,11,10,22,-4,1,-10,-14,-60,-59,-58,-42,-45,-52,-57,-56,-67,-20,-44,40,31,95,91,98,-78,0,13,87,0,0,7,50,20,91,84,112,110,141,117,121,115,176,176,176,176,179,179,189,193,259,210,191,188,207,208,412,413,417,410,425,410,416,383,387,361,422,421,528,415,427,417,420,334,414,343,445,444,440,334,334,334,334,334,431,424,519,519,519,519,519,376,519,500,762,672,602,595,804,589,566,558,555,446,439,425,431,425,422,408,784,780,749,676,5714,4704,7973,6697,29971,29972,29972,29972,29971,29972,29972,29973,29974,29975,29976,29976,29977,29977,29976,29976,29977,29978,29977,29978,29978,29979,29979,29980,29980,29981]} 1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Nb5 Na6 6. e3 {D00: 1 d4 d5: Unusual lines.} O-O 7. h3 c5 8. c3 {White has an edge.} Bd7 9. a4 c4 10. b3 cxb3 11. Qxb3 Qa5 $1 12. Rc1 Rfc8 {[#]} 13. Ne5 $146 ({Predecessor:} 13. Bd3 Nb8 14. O-O a6 15. Nc7 Rxc7 16. Bxc7 Qxc7 17. c4 dxc4 18. Bxc4 e6 19. Bxa6 {½-½ (32) Boudriga,M (2366)-Mohammad,N (2050) Hammamet 2019}) 13... Nb8 14. Nxd7 Nbxd7 15. Be2 a6 16. Na3 Ne4 {[%cal Re4c3]} 17. Nb1 Nb6 18. O-O Nxa4 (18... e6 $15) 19. c4 $14 Nb6 (19... b5 $14) 20. c5 $16 e5 21. f3 $2 Nxc5 (21... Nd2 $17 22. Nxd2 exf4) 22. dxc5 $11 {Strongly threatening Bxe5.} Rxc5 (22... exf4 $11 23. cxb6 fxe3) 23. Rxc5 ({White should try} 23. Bg5 $16) 23... Qxc5 24. Bg3 $36 {[%mdl 2048] White has good play.} Rc8 25. Bf2 Rc7 {[#]} (25... Bf8 $11 {remains equal.}) 26. Nc3 $1 $16 {White stays focused until the end.} Qxc3 (26... Rc6 27. Rc1) 27. Qxb6 Qc5 28. Qb3 b5 29. Rd1 Qc2 (29... d4 $16 30. Qd3 Qc2) 30. Qxc2 $18 Rxc2 31. Kf1 Rc5 32. Be1 d4 33. Ra1 Bh6 (33... e4 {was worth a try.}) 34. Bb4 Rc6 35. exd4 exd4 {[#]} 36. Bxb5 $1 {[%mdl 512]} Rc2 (36... axb5 {might work better.} 37. Ra8+ Kg7) 37. Bxa6 Be3 38. Be1 Rb2 39. Be2 h5 40. Rd1 f5 41. f4 Bxf4 42. Rxd4 Bg5 43. Rd7 Rc2 44. Bf3 Rc8 45. Rd6 Kh7 46. h4 Rd8 47. Rc6 Bf4 48. Rc4 Be5 49. Rc5 Bf6 50. Rc7+ Kg8 51. Bc3 Bxc3 52. Rxc3 {[%mdl 4096] Endgame KRB-KR} Kg7 53. Rc4 Rd2 54. Be2 Kf6 55. Kf2 Rb2 (55... Rd6 $142 56. Bf3 Kg7) 56. Ke3 Ke5 57. Rc6 f4+ 58. Kf3 Rb3+ 59. Kf2 Kf5 60. Kg1 Rb1+ 61. Kh2 {Bd3+ is the strong threat.} Rb2 62. Bd1 Rd2 63. Bf3 Rb2 (63... Rd4 $142 64. Ra6 Rc4) 64. Rc5+ Kf6 65. Be4 Re2 66. Rc6+ Ke7 67. Bf3 Re6 68. Rxe6+ {White mates.} Kxe6 {KB-K3P} 69. Be4 Kf6 70. Bc6 Kf5 71. Bd7+ Ke4 72. Kg1 Ke5 73. Kf2 Kf6 74. Bc8 g5 75. hxg5+ Kxg5 76. Kg1 Kf6 77. Kh2 Kg6 78. Kh3 Kg5 79. Bd7 Kg6 80. Kh4 {Weighted Error Value: White=0.26/Black=0.39} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.02"]
[Round "6.5"]
[White "Gavrish, Leonid"]
[Black "Vakulenko, Oleksandr"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "2085"]
[BlackElo "2256"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,88,-6,-6,-8,-7,11,10,10,15,14,9,-4,-2,-16,-21,-25,-41,-4,-10,0,-14,-11,-8,-24,-72,0,-70,-104,-91,-76,-292,-299,-322,-324,-326,-326,-338,-252,-333,-326,-326,-296,-331,-327,-272,-76,-215,78,77,60,0,0,17,5714,2405,29976,29977,29970,6002,29985,29966,4894,0,0,-1053,-897,-1202,-1186,-837,-847,-29993,-29994,-29994,-29995]} 1. d4 d5 2. c4 e6 3. Nc3 c6 4. cxd5 exd5 5. Qc2 Bd6 6. Nf3 Ne7 7. Bg5 f6 8. Bh4 Bf5 9. Qd2 Nd7 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} 10. e3 Nf8 11. Bg3 Ne6 {[#] The position is equal.} 12. Be2 $146 ({Predecessor:} 12. Bxd6 Qxd6 13. Nh4 Bg6 14. Nxg6 hxg6 15. g3 g5 16. Bg2 f5 17. O-O-O O-O-O 18. Kb1 {½-½ (62) Varnavski,S (2273)-Morozov,G (2337) Moscow 2008}) 12... g5 13. Bxd6 Qxd6 14. O-O h5 15. Ne1 g4 16. Nd3 h4 17. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} b6 {[%cal Bb7b6,Bb6c5,Bc5c4,Bc4d3][%mdl 32]} 18. b5 c5 $1 {[%cal Rc5d4]} 19. dxc5 bxc5 20. Rfd1 Kf7 (20... Rd8 $17 21. Rac1 Kf7) 21. f4 ({White should play} 21. Ne1 $1 $11) 21... d4 $36 {[%mdl 2048] Black has strong initiative.} 22. Qe1 {Black should prevent e4.} c4 23. e4 $2 cxd3 $19 24. exf5 Nxf5 ({Not} 24... dxe2 25. Ne4 $15) ({Worse is} 24... dxc3 25. fxe6+ Qxe6 26. Bxd3 $11) (24... Nxf4 25. Ne4 $19) 25. Ne4 Qxf4 26. Bxd3 {intending Bc4.} g3 27. h3 Ne3 28. Rdc1 Rhe8 29. Rc6 Rad8 30. Qe2 f5 $2 (30... Kg7 $19 {has better winning chances. White must now prevent ...f5.} 31. Nd2 Ng5) 31. Nd2 ({But not} 31. Qh5+ $2 Kg7 $19) (31. Nc5 $17) 31... Ng5 $2 {[#]} (31... Rc8 $19 {Threatens to win with ...Rxc6.} 32. Rac1 Rxc6 33. Rxc6 Kg7) 32. Qh5+ $1 $16 Ke7 {( -> ...Qf2+)} 33. Nf3 Nxf3+ 34. gxf3 {Threatening mate with Qh7+.} Rd7 $2 {[%mdl 8192]} (34... Nd5 $11) 35. Rac1 $18 {Qh7+ would kill now.} Nc4 36. Re1+ Ne3 37. Qg6 (37. Bxf5 $142 Kd8 {[#]} 38. Rc8+ $3 {[%mdl 576] Deflection, Decoy} Kxc8 39. Qxe8+ {[%mdl 64] Double Attack, Pin} Kb7 40. Qxd7+ Qc7 41. Qxd4 {[%mdl 64] Double Attack} Qb6 42. Qg7+ Qc7 43. Qd4) 37... Kd8 38. Qf6+ Rde7 39. Be4 $2 Qe5 $11 40. Qxe5 {[%mdl 8192]} (40. Rd6+ $11 Kc8 41. Qxe5 Rxe5 42. Rxd4) 40... Rxe5 $19 41. Bd3 Nd5 42. Rxe5 Rxe5 43. Rh6 Re1+ 44. Bf1 Ne3 {[%csl Ge3][%cal Re1f1] Weighted Error Value: White=0.83/Black=0.74} 0-1

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.03"]
[Round "7.1"]
[White "Vakulenko, Oleksandr"]
[Black "Kozak, Leonid"]
[Result "*"]
[WhiteElo "2256"]
[BlackElo "2244"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,36,38,42,27,39,33,48,22,43,17,26,15,25,14,8,4,15,16,69]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. Qd2 Nbd7 9. d5 cxd5 10. cxd5 a6 11. a4 {E89: King's Indian: Sämisch: 6...e5 7 d5 c6 8 Nge2 cxd5.} Nc5 {Threatening ...Nb3.} 12. Ra3 a5 {[#]} 13. Nb5 $146 {White is slightly better.} ({Predecessor:} 13. Ng3 h5 14. Bb5 h4 15. Nge2 Nh5 16. g4 Nf4 17. Nxf4 exf4 18. Bxf4 Qe7 19. O-O {1-0 (35) Graf,A (2580)-Arduman,C (2355) Komotini 1993}) 13... Ne8 14. Nec3 b6 15. Be2 f5 16. exf5 gxf5 {The position is equal.} 17. f4 Nf6 18. O-O e4 {Weighted Error Value: White=0.11/Black=0.08} (18... Nfe4 $11 19. Qc2 Bb7) *

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.03"]
[Round "7.2"]
[White "Kocyigit, Buse Naz"]
[Black "Gavrish, Leonid"]
[Result "*"]
[ECO "A05"]
[WhiteElo "2143"]
[BlackElo "2085"]
[Annotator "TA"]
[PlyCount "30"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,30,25,-19,20,0,0,0,0,-30,-45,-64,-72,-132,-124,-154,-149,-181,-162]} 1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 cxd4 7. Nxd4 Nc6 8. Nb3 a5 {[%cal Ba7a5,Ba5a4][%mdl 32] E60: King's Indian: Unusual lines and Fianchetto Variation without Nc3.} 9. Nc3 a4 10. Nc5 a3 $1 {[#] The position is equal.} 11. Qc2 $146 ({Predecessor:} 11. b3 Qa5 12. Nb5 d6 13. Nd3 Bf5 14. Bxa3 Ne4 15. Bb2 Nc3 16. Bxc3 Bxc3 17. Nxc3 Qxc3 {1-0 (40) Sjoestroem,O-Jaeger,M Wiesbaden 1998}) 11... d6 12. N5a4 axb2 13. Bxb2 (13. Nxb2 $142 Bf5 14. e4) 13... Qa5 $17 14. Rab1 {[#]} Bf5 $1 {[%cal Rf5c2]} 15. e4 Be6 {White got outplayed after the opening.  Weighted Error Value: White=0.27/Black=0.05} *

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.03"]
[Round "7.3"]
[White "Anwesh, Upadhyaya"]
[Black "Okhotnik, Vladimir"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2364"]
[BlackElo "2350"]
[Annotator "TA"]
[PlyCount "48"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,20,13,18,12]} 1. g3 Nf6 2. Bg2 d5 3. c4 c6 4. cxd5 cxd5 5. Nf3 g6 6. O-O Bg7 7. d4 O-O 8. Nc3 Nc6 9. Ne5 Bf5 10. Bf4 Rc8 {[#] An uneventful encounter. 10...Ne4 is more advanced technology. D79: Fianchetto Grünfeld: Symmetrical Variation (6 0-0 c6 7 cxd5 cxd5).} {Predecessor:} 11. Rc1 $146 Qa5 12. Qd2 Rfd8 13. h3 Qa6 14. g4 Be6 15. Rfd1 Ne4 16. Nxe4 dxe4 17. Nxc6 Rxc6 18. Rxc6 Qxc6 19. Qa5 Qb6 20. Qxb6 axb6 21. Bxe4 Bxa2 22. d5 Bxb2 23. Rd2 Bc1 24. Rxa2 Bxf4 {½-½ (24) Ghasi,A (2485)-Turner,M (2509) Tornelo INT 2021} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.03"]
[Round "7.4"]
[White "Sydoryka, Vladyslav"]
[Black "Bondar, Dmytro"]
[Result "*"]
[WhiteElo "2331"]
[BlackElo "2254"]
[Annotator "TA"]
[PlyCount "32"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,32,0,3,0,0,0,0,0,-6,0,0,-12,-22,-22,-10,-24,-22,-45,11,7,71,71,71,73,75]} 1. Nf3 c5 2. b3 Nc6 3. Bb2 d6 4. c4 Bf5 5. e3 e5 {[#]} 6. d3 $146 {A30: Symmetrical English: Double Fianchetto and Hedgehog.} ({Predecessor:} 6. Nc3 g6 7. Be2 Bg7 8. O-O Nge7 9. d3 O-O 10. Qd2 Be6 11. Rfd1 Nf5 12. a3 {½-½ (48) Speelman,J (2410)-Morrison,G Amsterdam 1978}) 6... g6 7. Be2 Bg7 8. O-O {The position is equal.} Nge7 9. a3 O-O 10. Qc2 a6 11. Nc3 Rb8 12. Rab1 b5 13. Nd5 bxc4 ({Black should try} 13... Be6 $15) 14. bxc4 $11 {[%cal Bb3c4,Bc4d5][%mdl 32]} Nxd5 (14... Be6 $11) 15. cxd5 $16 Ne7 16. e4 Bd7 {Weighted Error Value: White=0.06/Black=0.14} *

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.03"]
[Round "7.5"]
[White "Boricsev, Oleg"]
[Black "Kushko, Dmitriy"]
[Result "*"]
[WhiteElo "2234"]
[BlackElo "2285"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,45,8,8,6,7,8,10,6,0,-2,33,-5,-5,-14,-16,-22,-14,-18,-19,-13,-7,-21,-26,-23,0,0,0,0,0,0,0,-3,0,-4,14,8,12,9]} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bf4 c6 5. e5 dxe5 6. dxe5 {B07: Pirc Defence: Miscellaneous Systems.} Nd5 7. Nxd5 cxd5 8. Qd2 Nc6 9. O-O-O {[#]} Bg4 $146 ({Predecessor:} 9... Be6 10. Nf3 Bg7 11. Bh6 Bxh6 12. Qxh6 Qa5 13. Rd3 d4 14. Nxd4 O-O-O 15. Qe3 Rxd4 16. Rxd4 Nxd4 17. Qxd4 {½-½ (34) Jaunooby,A (2170)-Polaczek,R (2414) England 2016}) 10. Be2 Bxe2 11. Nxe2 e6 12. Bg5 $1 {[%cal Rg5d8]} Be7 13. Bxe7 Qxe7 14. f4 Qc5 15. Nd4 (15. g4 {keeps more tension.} O-O-O 16. Kb1 Kb8 17. Rhf1 Rc8 18. h4) 15... Nxd4 16. Qxd4 Qxd4 (16... Rc8 {with more complications.} 17. Qxc5 Rxc5 18. Rd4 Kd7 19. a4 Rhc8) 17. Rxd4 $11 {[%mdl 4096] Endgame KRR-KRR. The position is equal.} Ke7 18. Rhd1 Rhc8 19. R1d3 h5 20. Kd2 Rc6 21. Rc3 Rac8 22. Rxc6 Rxc6 23. Kd3 {A rather calm draw.  Weighted Error Value: White=0.04/Black=0.06} *

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.04"]
[Round "8.1"]
[White "Kozak, Leonid"]
[Black "Kushko, Dmitriy"]
[Result "1/2-1/2"]
[ECO "A41"]
[WhiteElo "2244"]
[BlackElo "2285"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,106,-22,-19,-21,-27,-34,-10,-10,-3,-24,-24,-24,-15,-29,-25,-27,-21,-21,-19,-52,-43,-48,-41,-62,-52,-89,-16,-44,-8,-15,-15,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-28,-31,-31,-31,-31,-31,-11,-19,0,-21,-21,-87,0,-87,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d6 2. c4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. Nc3 c6 6. b3 Be6 7. Bb2 Nd7 8. e3 f6 9. O-O-O Kc7 10. Bd3 {A41: 1 d4 d6: Tartakower System and Modern Defence.} Nh6 11. h3 Nc5 12. Bc2 a5 13. Ne4 a4 14. Nxc5 Bxc5 15. Ne2 axb3 16. axb3 Nf7 17. Nc3 Nd6 18. Na4 Bb4 {[#]} 19. Nc3 $146 ({Predecessor:} 19. Bc3 Rxa4 20. bxa4 Bxc3 21. c5 Nf7 {0-1 (21) Grahn,L (2024)-Rooze,J (2281) Mali Losinj 2019}) 19... h5 20. Kb1 h4 21. Ne4 Nf7 (21... Rhb8 $17 22. Nxd6 Bxd6) 22. f3 Rad8 (22... Rhb8 {looks sharper.} 23. Rhg1 f5 24. Nc3 Bc5 25. Rge1 g5) 23. Rxd8 Rxd8 24. Rd1 Rxd1+ 25. Bxd1 Bf5 26. Bc2 Bxe4 27. Bxe4 $11 {[%mdl 4096] Endgame KBB-KBN} Bd2 28. Bc1 Bxc1 29. Kxc1 {KB-KN} Nd6 30. Bd3 c5 31. Kb2 Kd7 32. Kc3 b6 33. b4 g5 34. b5 f5 35. e4 (35. Kd2 $11) 35... Ke6 ({Black should play} 35... f4 $17) 36. Kd2 {[#]} (36. exf5+ $11 {remains equal.} Nxf5 37. Kd2) 36... fxe4 (36... f4 $1 $17) 37. fxe4 {The position is equal.} Kf6 38. Ke3 g4 39. Be2 gxh3 40. gxh3 Kg5 41. Bd3 Nb7 42. Kf3 Na5 43. Bf1 Nb3 44. Ke3 Nd4 45. Bd3 Kg6 (45... Ne6 {keeps more tension.} 46. Be2 Nd4 47. Bg4 Nc2+ 48. Kd3 Nb4+) 46. Bf1 Kf6 (46... Kg5 $5) 47. Bd3 Kg5 48. Bf1 Nc2+ 49. Kd2 Nb4 {[#] aiming for ...Kf4.} (49... Na1 $5 50. Ke3 $8 Nc2+ 51. Kf3 Kf6 $11) 50. Ke3 Na2 {And now ...Nb4 would win.} 51. Kf3 Nc1 52. Ke3 Nb3 (52... Na2 $5 {[%cal Ra2b4]} 53. Be2 Nb4 $11) 53. Bd3 Nd4 {Weighted Error Value: White=0.11/Black=0.10} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.04"]
[Round "8.2"]
[White "Bondar, Dmytro"]
[Black "Boricsev, Oleg"]
[Result "1-0"]
[ECO "C10"]
[WhiteElo "2254"]
[BlackElo "2234"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,119,28,37,17,31,-2,42,38,74,77,76,70,75,0,0,0,4,0,0,0,0,0,0,-47,0,0,0,0,0,0,0,-15,0,-32,-45,-60,-25,-39,-12,-17,-10,-72,-72,-75,0,0,0,0,0,0,0,0,0,0,0,-40,0,-80,0,0,18,14,103,103,103,103,114,103,103,104,124,103,103,103,103,103,103,104,447,443,447,409,311,327,334,352,468,468,852,594,2354,1726,2350,1963,2164,1955,6629,5820,2095,1922,1760,1617,1547,1250,2175,1916]} 1. e4 e6 2. d4 d5 3. Nc3 Nc6 4. Nf3 Nf6 5. e5 Ne4 6. Bd3 Bb4 7. Bd2 Nxd2 8. Qxd2 Bd7 9. a3 {C10: French with 3 Nc3: Unusual Black 3rd moves and 3...dxe4.} Bxc3 {is the legacy move (9...Be7).} 10. bxc3 f6 {[#]} 11. exf6 $146 {White is slightly better.} ({Predecessor:} 11. O-O Qe7 12. a4 O-O 13. a5 fxe5 14. Nxe5 Nxe5 15. dxe5 Qc5 16. Rab1 b6 17. Rb4 bxa5 {½-½ (32) Kaspret,G (2315)-Klinger,J (2435) Austria 1994}) 11... Qxf6 12. O-O O-O 13. Rae1 Rae8 14. Ng5 (14. c4 $16) 14... h6 $11 15. Nf3 e5 {With the idea ...e4.} 16. dxe5 Nxe5 17. Nxe5 Rxe5 18. Rxe5 Qxe5 19. Re1 Qf6 20. c4 d4 21. Be4 b6 22. f3 Rd8 23. Qd3 Be6 24. h4 Bf7 25. g3 Qd6 26. Kg2 Qc5 27. Bh7+ Kh8 28. Bg6 (28. Qf5 $1 $11 {remains equal.}) 28... Bxc4 $17 29. Qe4 Bg8 ({Black should try} 29... Qxa3 $17 {And now ...Qc3 would win.} 30. Qc6 Bg8 31. Qxc7 Rf8) 30. Qe7 $11 Qxe7 31. Rxe7 {[%mdl 4096] Endgame KRB-KRB} c5 32. Kf2 c4 33. Ke2 Rd6 34. Be4 g5 35. h5 Bd5 36. Bf5 (36. Bxd5 $11 {keeps the balance.} Rxd5 37. Rxa7) 36... Rf6 (36... a6 $17) 37. g4 Bf7 38. Be4 Kg7 (38... a5 $11) 39. Rxa7 $16 Rd6 {[#]} 40. Bg6 $1 Re6+ 41. Kf2 Rf6 42. Rd7 b5 43. Rb7 Kf8 44. Bxf7 ({Much worse is} 44. Rxb5 $6 Bxg6 45. hxg6 Ra6 $11) 44... Rxf7 45. Rxb5 {KR-KR} Ra7 46. Rb4 d3 $2 {[%mdl 8192] A mistake that costs the game.} (46... Rxa3 $16 47. Rxc4 Kg7) 47. cxd3 $18 cxd3 48. Rb3 Rd7 {[#] Threatens to win with ...d2.} 49. Ke1 d2+ 50. Kd1 Kf7 51. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32] White is clearly winning.} Ke6 (51... Ra7 $142 52. Rb4 (52. Kxd2 Rxa4 53. Rb7+ Kg8 $16) 52... Ke7 53. Kxd2 Ke8) 52. a5 Ke5 53. a6 Kf4 54. Ra3 Ra7 55. Kxd2 Rd7+ 56. Ke2 Ra7 57. Kf2 {Intending Ra5 and mate.} Ke5 58. Ke3 Kd5 59. Ra5+ Ke6 60. Ke4 {Weighted Error Value: White=0.14/Black=0.37} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.04"]
[Round "8.3"]
[White "Okhotnik, Vladimir"]
[Black "Sydoryka, Vladyslav"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2350"]
[BlackElo "2331"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,73,10,10,-8,20,5,2,0,0,0,0,-3,19,18,18,19,26,0,0,0,16,0,0,-3,0,-12,-12,-12,9,0,0,0,0,0,6,0,0,0,39,37,37,35,33,33,53,66,55,55,59,46,118,0,62,64,183,170,723,706,820,807,824,808,732,691]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Bd3 Bxd3 6. Qxd3 e6 7. Ne2 {B12: Caro-Kann: Advance Variation.} Ne7 {[#]} 8. c3 $146 ({Predecessor:} 8. Bg5 Qb6 9. Nbc3 Nd7 10. O-O Nf5 11. Na4 Qb5 12. Qxb5 cxb5 13. Nac3 a6 14. g3 Rc8 {½-½ (70) Buganca,L (1663)-Maciel,D (1972) Florianopolis 2018}) 8... Nf5 9. Bg5 {The position is equal.} Be7 10. Bxe7 Qxe7 11. g3 Qd8 12. Na3 {[%cal Bb1a3,Ba3c2,Bc2e3][%mdl 32]} Qb6 13. O-O-O Qa6 14. Qxa6 Nxa6 15. Nc2 g6 16. Nf4 c5 17. Ne3 Ne7 18. dxc5 Nxc5 19. c4 Ne4 20. Rhf1 {[%cal Rc4d5]} ({Don't play} 20. cxd5 Nxf2 21. dxe6 Rc8+ 22. Kb1 Nxh1 $17) 20... Rc8 21. Kb1 {[%cal Rc4d5]} dxc4 22. Rd4 {[%mdl 64] [#] Double Attack} Nc5 {White must now prevent ...b5.} 23. Rxc4 {aiming for Rfc1.} b5 24. Rc2 $36 {[%mdl 2048] And now Rfc1 would win. White is more active.} Nb7 25. Rxc8+ Nxc8 26. Rc1 Kd7 27. Nh3 Ne7 28. Ng5 Nc6 29. f4 Rf8 30. Nf1 Nb4 (30... Kc7 $14) 31. Ne3 (31. Nd2 $16) 31... Nc6 $1 $14 32. Nd1 Nd4 ({Better is} 32... b4 $14) 33. Nc3 $18 {[#] Hoping for Rd1.} Nd8 $2 (33... b4) 34. Rd1 {White is clearly winning.} N8c6 35. Nxb5 Kc8 36. Nxd4 Rd8 37. Ngf3 {Weighted Error Value: White=0.08/Black=0.15} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.04"]
[Round "8.4"]
[White "Gavrish, Leonid"]
[Black "Anwesh, Upadhyaya"]
[Result "1/2-1/2"]
[ECO "D31"]
[WhiteElo "2085"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,117,28,27,27,38,16,29,12,41,40,48,46,34,40,44,36,37,41,57,60,70,66,63,55,58,60,79,0,108,97,93,104,110,99,148,154,194,216,311,119,122,5,5,8,8,8,7,0,0,0,1,8,8,8,8,0,0,0,71,66,69,55,58,35,25,0,49,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nc3 a6 4. cxd5 exd5 5. Nf3 Be7 6. Bf4 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} Nf6 7. Qc2 Nc6 8. a3 {[#] White has an edge.} g6 $146 ({Predecessor:} 8... O-O 9. e3 h6 10. Bd3 Re8 11. O-O Bd6 12. Bg3 Ne7 13. Rac1 c6 14. Na4 Be6 {1-0 (26) Cardoso,J (1675)-Norena,D (1559) Cali 2016}) 9. e3 Bf5 10. Bd3 Bxd3 11. Qxd3 O-O 12. O-O Re8 13. Ne5 Bd6 {[%cal Rc6e5]} 14. Nxc6 bxc6 15. Bg3 Bxg3 16. hxg3 Ng4 {White should prevent ...Qg5.} 17. Ne2 h5 {Threatening ...h4.} 18. Rac1 ({Better is} 18. Qd1 $16) 18... Qf6 (18... h4 $11) 19. Nf4 $16 g5 20. Nh3 Re6 21. Rc5 Kg7 22. Qc3 Rh8 23. e4 $1 {[%cal Re4d5]} Rxe4 {[#]} (23... dxe4 {was called for.} 24. Rxg5+ Kf8 25. Qc5+ Re7) 24. Rxc6 $2 (24. f3 $1 $18 {[%cal Rf3e4] and the rest is easy.} Qxd4+ 25. Qxd4+ Rxd4 26. fxg4) 24... Qxd4 {[#]} 25. Nxg5 (25. Qc1 $1 $16) 25... Qxc3 $11 26. Rxc3 Rc4 27. Rxc4 dxc4 {[%mdl 4096] Endgame KRN-KRN} 28. f3 Ne5 29. Rc1 Rb8 30. Rc2 Nd3 31. Rxc4 Rxb2 32. Ne4 Rb1+ 33. Kh2 f5 (33... c5 $11 {keeps the balance.}) 34. Rxc7+ $16 Kf8 $1 35. Nd2 Ra1 36. Rc2 (36. Nb3 {feels hotter.} Rb1 37. Rc3 Nf2 38. Nc1 a5 39. Rc2) 36... Rxa3 37. Kh3 Ra4 38. Rc4 Ra2 {The position is equal.} 39. Rc8+ Ke7 40. Nc4 Rc2 (40... Ra1 $5 41. Kh4 $8 Rc1 $11) 41. Rc7+ Ke6 {Strongly threatening ...Rc1!} 42. Rc6+ Kd5 43. Ne3+ Kxc6 44. Nxc2 $11 {KN-KN} a5 45. Kh4 a4 46. Kxh5 Kc5 47. Kg5 Kc4 {Hoping for ...Kb3.} 48. Kxf5 {g4 is the strong threat.} Kc3 49. Na1 {aiming for g4.} Ne1 (49... a3 {looks sharper.} 50. g4 a2 51. g5 Kb2 52. g6 Kxa1 53. g7 Kb1) 50. g4 Nxg2 51. g5 Kb2 52. g6 Nh4+ {[%mdl 64] Double Attack} 53. Kf6 {Black must now prevent g7.} Nxg6 54. Kxg6 {KN-KP} a3 (54... Kxa1 {is interesting.} 55. f4 Kb2 56. f5 a3 57. f6 a2) 55. f4 a2 56. f5 Kxa1 57. f6 Kb1 58. f7 a1=Q {( -> ...Qh8)} 59. f8=Q {Weighted Error Value: White=0.15/Black=0.12} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.04"]
[Round "8.5"]
[White "Vakulenko, Oleksandr"]
[Black "Kocyigit, Buse Naz"]
[Result "1-0"]
[ECO "E81"]
[WhiteElo "2256"]
[BlackElo "2143"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,85,4,13,6,18,11,12,0,9,30,27,52,39,62,33,37,28,40,0,-4,-20,0,0,41,-8,-5,-53,145,149,141,138,133,136,212,187,391,395,677,654,881,841,786,522,1537,937,903,837,1018,1017,1004,1003,974,977,1040,986,1258,1261,1486,1525,1873,1813,29971,29974,29974,29975,29983,29978,29983,29983,29979,29978]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5 7. d5 e6 8. Nge2 exd5 9. cxd5 a6 {A65: Modern Benoni: 6 e4.} 10. a4 Nbd7 11. Ng3 h5 {The position is equal. 11...h5 scores better than 11...Ne5.} 12. Be2 h4 13. Nf1 Ne5 14. h3 Nh7 15. Nd2 (15. f4 $5 {[%cal Rf4e5]}) 15... f5 {[#]} 16. f4 $146 ({Predecessor:} 16. O-O Qf6 17. f4 Nd7 18. exf5 gxf5 19. Nf3 Qh6 20. Bd3 Rf7 21. Qd2 Ndf8 22. Rae1 {1-0 (37) Astengo,M (2030)-Miracola,M (2083) Milan 2012}) 16... Nf7 17. exf5 Bxf5 {Threatens to win with ...Re8.} 18. O-O Qd7 19. Bf2 $36 {[%mdl 2048] White has good play.} Nh6 20. Nf3 (20. Bxh4 Bxh3 21. Nc4 (21. gxh3 $2 Qxh3 {[%mdl 64] Double Attack} 22. Nce4 Qxh4 $19) 21... Rae8 $11) 20... Bxh3 21. Qd2 Bxg2 22. Kxg2 $16 {White now steadily converts the win.} Qg4+ 23. Kh1 Rae8 {[#]} (23... Rxf4 $2 24. Nh2 $18) 24. Rae1 $1 c4 (24... Rxf4 $2 25. Nh2) (24... Qxf4 $16 {is a better defense.} 25. Qxf4 (25. Bxh4 Qg4 $17) 25... Rxf4) 25. Rg1 $18 ({And not} 25. Nxh4 Qh3+ 26. Kg1 Nf6 $11) 25... Qh3+ (25... Qxf4 26. Qxf4 (26. Bxh4 Rxe2 27. Qxf4 Rxf4 $16) 26... Rxf4) 26. Nh2 Nf6 $2 (26... Qf5 27. Bxc4 Rxe1 28. Bxe1 Qxf4 29. Rxg6 Kh8) 27. Rxg6 Kh8 28. Reg1 Re7 29. f5 Nfg8 30. Bd4 {Threatening mate with Rxh6+.} Nxf5 {[#]} 31. Bf1 $1 Ng3+ {[#]} (31... Qxh2+ 32. Kxh2) 32. R6xg3 $1 {[%mdl 512]} Qxg3 33. Rxg3 hxg3 34. Bxc4 Nf6 35. Nf1 Ng4 36. Nxg3 Rf3 37. Kg2 Rff7 38. Nce4 Kg8 39. Qg5 {White mates.} Ne5 {[#]} 40. Nf5 $1 Rxf5 (40... Kf8 41. Nexd6) 41. Qxf5 Nxc4 42. Nf6+ Bxf6 43. Qxf6 {Weighted Error Value: White=0.30/Black=0.57} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.05"]
[Round "9.1"]
[White "Kocyigit, Buse Naz"]
[Black "Kozak, Leonid"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2143"]
[BlackElo "2244"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,17,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 {[#]} {Predecessor:} Re8 $146 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} 10. Nd5 Nxd5 11. cxd5 c6 12. Bc4 cxd5 13. Bxd5 Nd7 14. Nd2 Nb6 15. Bb3 Be6 16. Bxe6 Rxe6 17. Rc1 Rc8 18. Ke2 Rec6 19. Rxc6 Rxc6 20. b3 Bf8 21. Be3 Bb4 22. a3 Bxa3 {½-½ (32) So,W (2770)-Carlsen,M (2862) chess24.com INT 2020} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.05"]
[Round "9.2"]
[White "Anwesh, Upadhyaya"]
[Black "Vakulenko, Oleksandr"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2364"]
[BlackElo "2256"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,57,12,14,30,-10,-14,-25,6,0,13,0,7,0,8,0,18,22,16,18,68,52,328,344,490,439,425,327,430,425,564,557,565,562,712,576,5118,5118,5110,5110]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. e5 Ne4 7. O-O Be7 8. Nxd4 Nxd4 9. Qxd4 Nc5 10. Nc3 O-O 11. Nd5 Re8 {C84: Closed Ruy Lopez: Unusual White 6th moves.} 12. Be3 {[#]} Bf8 $146 ({Predecessor:} 12... c6 13. Nxe7+ Qxe7 14. Qxc5 {1-0 (14) Perez Pastora,E (2022)-Garcia Martinez,J (2058) Barcelona 2019}) 13. Rad1 b5 {Black has an edge.} 14. Bb3 Nxb3 15. axb3 Bb7 16. Bf4 d6 17. Qc3 c6 (17... Rc8 $5 {[%cal Rd6e5]}) 18. Ne3 {[%cal Re5d6]} d5 $1 19. Nf5 b4 20. Qg3 $36 {[%mdl 2048] aiming for Nh6+. White fights for an advantage.} Qd7 $2 {[%mdl 8192] [#] Black cannot hold the game after this.} (20... Kh8 $14) 21. Nxg7 $1 $18 {[%mdl 512]} Kh8 (21... Bxg7 $142 22. Bh6 f5) 22. Nxe8 ({Less strong is} 22. Nh5 Qf5 $18) 22... Rxe8 23. Rfe1 Bg7 24. Bg5 {White is clearly winning.} c5 25. Bf6 {[%csl Gf6][%cal Rg3g7]} Rg8 {next ...Bxf6 is good for Black.} 26. Qf4 d4 27. Rd3 {Threatens to win with Rg3.} Bxg2 28. Rg3 {Bxg7+ would kill now.} Bh3 29. Bxg7+ {Weighted Error Value: White=0.19/Black=0.68} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.05"]
[Round "9.3"]
[White "Sydoryka, Vladyslav"]
[Black "Gavrish, Leonid"]
[Result "1-0"]
[ECO "A15"]
[WhiteElo "2331"]
[BlackElo "2085"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,75,33,35,31,33,52,12,34,11,35,0,43,54,49,60,54,66,64,13,20,10,77,73,72,54,68,64,70,50,112,113,247,247,237,219,178,170,346,403,390,373,29976,29978,29978,29978,29976,29979,29979,1797,29980,29981,29996,29997,29997,29998]} 1. c4 Nf6 2. g3 c5 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 O-O 6. d4 cxd4 7. Nxd4 Nc6 8. O-O Ng4 9. e3 d6 10. b3 Nxd4 11. exd4 Nh6 12. Bd2 Nf5 {A39: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4.} 13. d5 Bd7 14. Re1 a6 {The position is equal.} 15. a4 Re8 {[#]} 16. a5 $146 ({Predecessor:} 16. Rc1 Rc8 17. h3 Qb6 18. Ne4 a5 19. g4 Nh4 20. Be3 Qb4 21. Bg5 Nxg2 22. Bd2 {1-0 (40) Vekelis,G (2345)-Gouma,R (2246) ICCF email 2016}) 16... Rc8 17. Ra3 h5 18. Ne4 b5 19. axb6 $1 Qxb6 20. Bf1 ({Better is} 20. Qb1 $14) 20... Nd4 {Threatening ...Bg4.} 21. h3 e5 (21... e6 $1 $11) 22. b4 Bf5 23. g4 hxg4 24. hxg4 Bxe4 25. Rxe4 a5 (25... Rc7 $14) 26. Rxa5 $16 f5 {This costs Black the game.} (26... Qd8 $16 27. Ra3 Qd7) 27. gxf5 $18 gxf5 28. Rh4 e4 {[#] Strongly threatening ...Nf3+.} 29. Ra3 {Black must now prevent Qh5.} Nf3+ $2 (29... Qd8 {is a better defense.} 30. Rhh3 Qf6) 30. Rxf3 exf3 31. Qxf3 Re4 $2 (31... Qd8 $18) 32. Qxf5 Rxh4 33. Qe6+ Kf8 34. Qxc8+ Kf7 35. Qe6+ Kf8 36. Bg5 {White mates.} Rh5 37. Be7+ {[%mdl 64] [#] Double Attack} Ke8 38. Bf6+ {[%mdl 64] Discovered Attack.  Weighted Error Value: White=0.10/Black=0.66} 1-0

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.05"]
[Round "9.4"]
[White "Boricsev, Oleg"]
[Black "Okhotnik, Vladimir"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2234"]
[BlackElo "2350"]
[Annotator "TA"]
[PlyCount "20"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,20,7,-4,-4,-12,0,0,26,17,25,6,32]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4 Nxe4 5. Qe2 Qe7 6. d3 Nf6 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} 7. Bg5 Qxe2+ 8. Bxe2 Nd5 {[#]} 9. Ne3 $146 ({Predecessor:} 9. Bf3 Be7 10. Bxe7 Nxe7 11. Nc3 Nbc6 12. Ne2 Be6 13. O-O-O d5 14. Ne3 Ne5 15. Bh5 {0-1 (69) Potapov,P (2406)-Ilincic,Z (2451) Budapest 2006}) 9... Nxe3 10. Bxe3 Be7 {A rather calm draw.  Weighted Error Value: White=0.09/Black=0.12} 1/2-1/2

[Event "Mykolaiv IM Feb 2021"]
[Site "Mykolaiv"]
[Date "2021.03.05"]
[Round "9.5"]
[White "Kushko, Dmitriy"]
[Black "Bondar, Dmytro"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2285"]
[BlackElo "2254"]
[Annotator "TA"]
[PlyCount "153"]
[EventDate "2021.02.25"]
[EventType "tourn"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,153,15,0,0,0,0,0,3,-2,9,4,8,5,12,13,30,25,30,16,34,35,40,39,84,94,82,83,85,81,125,125,125,125,125,125,125,125,125,125,125,125,125,125,125,125,125,125,139,132,126,125,132,132,132,132,145,145,145,138,155,155,155,155,155,155,155,155,167,155,150,146,312,266,267,267,505,502,489,433,835,752,878,866,555,737,676,0,96,0,927,933,984,1006,737,983,705,900,900,608,737,188,731,593,486,188,188,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12847,12844,12845,12845,12845,0,0,-28000,-28000,-28000,-28000,-28000]} 1. g3 c5 2. Bg2 g6 3. c4 Bg7 4. Nc3 Nc6 5. Nf3 d6 6. a3 e6 {A37: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3.} 7. h4 h6 8. d3 Nge7 {The position is equal.} 9. Bd2 O-O 10. Rb1 b6 11. Qc1 {[#]} h5 $146 ({Predecessor:} 11... Kh7 12. b4 Rb8 13. bxc5 dxc5 14. Kf1 f5 15. Kg1 Nd4 16. Nxd4 cxd4 17. Nd1 Bb7 18. Bxb7 Rxb7 {0-1 (65) Loginov,V (2500)-Sivokho,S (2425) St Petersburg 1998}) 12. Bh6 Bb7 13. Bxg7 Kxg7 14. O-O Qc7 15. b4 Rad8 16. Qb2 e5 17. bxc5 dxc5 18. Nb5 $1 $36 {[%cal Rb5c7][%mdl 2048] White has strong initiative.} Qb8 {[#]} 19. Nxe5 $1 Qxe5 (19... Nxe5 20. Bxb7) 20. Qxe5+ Nxe5 21. Bxb7 N5c6 22. Bxc6 Nxc6 23. Kg2 Rfe8 24. Rfe1 Re7 25. Nc3 Nd4 26. e3 Nc6 27. Nd5 Red7 28. f4 Ne7 29. e4 Nc6 30. Rb2 Nd4 31. Kf2 Re8 32. Rg1 f5 33. Re1 Re6 34. exf5 gxf5 35. Rxe6 Nxe6 $16 {[%mdl 4096] Endgame KRN-KRN} 36. Re2 $1 {[%cal Re2e6]} Kf7 37. a4 Nd4 38. Re5 Rb7 39. Ne3 Kg6 40. Rd5 a6 $2 (40... Kf6 $16 41. Rd8 Kg7) 41. Rd6+ $18 Kg7 42. Nd5 b5 $2 (42... Kf8 43. Kg2 (43. Nxb6 a5 $16) (43. Rxb6 Rxb6 44. Nxb6 Ke7 $18) 43... b5) 43. cxb5 axb5 44. a5 {[%cal Ba4a5,Ba5a6][%mdl 32]} b4 (44... Kf8 $142 45. a6 Ra7 46. Rf6+ Kg7) 45. a6 Rb5 46. a7 ({Not} 46. Rd7+ Kg6 $18) 46... Ra5 47. Rd7+ Kh6 {[#]} 48. Rd6+ $2 (48. Nxb4 $1 $18 {[%mdl 512]} cxb4 49. Rxd4) 48... Kg7 $16 {[#]} 49. Rd7+ $2 {[%mdl 8192]} (49. Nxb4 $1 $16 Rxa7 50. Na6) 49... Kh6 $1 $18 {[#]} 50. Nxb4 $1 {[%mdl 512]} cxb4 (50... Nb5 51. Nc6) 51. Rxd4 Rxa7 52. Rxb4 {KR-KR} Ra2+ 53. Ke3 Rg2 54. Kf3 $1 {[%cal Rf3g2]} Rd2 55. Rd4 (55. d4 Rd3+ 56. Kf2) 55... Kg6 $2 (55... Rb2 56. Rd6+ Kg7 57. Rd7+ Kg6 58. Rd6+ Kg7) 56. Rd6+ Kg7 57. Ke3 $2 (57. Rd7+ Kf6 58. Rd6+ Kg7 59. Rd7+ Kh6 60. Rd8) 57... Rg2 58. Kd4 $2 (58. Rd7+ $1 $18 Kg6 59. Kf3) 58... Rxg3 $11 59. Ke5 Rh3 60. Kxf5 {Threatens to win with Kg5.} Rxh4 61. d4 {aiming for d5.} Rh1 62. Rd7+ (62. d5 {is interesting.} h4 63. Rb6 Rd1 64. d6 h3 65. Rb7+) 62... Kh6 $1 63. Rd6+ Kg7 64. Rd7+ (64. d5 {is more complex.} h4 65. Rb6 Rd1 66. d6 h3 67. Rb7+) 64... Kh6 $1 65. d5 {d6 is the strong threat.} h4 $1 66. Rd6+ Kg7 67. Ra6 h3 68. Ra7+ (68. d6 {looks sharper.} Rd1 69. Ra7+ Kh6 70. d7 h2 71. d8=R) 68... Kg8 69. Ra8+ Kg7 70. Ra7+ (70. d6 {with more complications.} Rd1 71. Ra7+ Kf8 72. Ra8+ Kf7 73. Ra7+) 70... Kg8 71. Ra2 h2 $2 {[%mdl 8192]} (71... Rd1 $11) 72. Rd2 Kf7 {[#]} 73. d6 $1 {[%cal Rd6d7] White wants to mate with d7.} Ke8 {[#]} 74. Kf6 $2 (74. Re2+ $1 $18 Kd7 75. Ke5) 74... Rf1 $2 {[%mdl 8192]} ({Avoid the trap} 74... Kd7 $2 75. f5 $18) (74... Kd8 $11) 75. Rxh2 Rxf4+ 76. Ke5 Rf1 77. Rh8+ {[%mdl 32768] Weighted Error Value: White=0.36/Black=0.16. An unexpected result.} 1/2-1/2

